Time period 1.5 weeks CONTENT Geography & Prehistory Standard(s) Demonstrate understanding of social, political, geographic & economic changes that took place in Africa, Asia, Europe & the Americas LESSON ONE Bellringer Play Lucy in the Sky with Diamonds as kids come in room & give them a tiny slip of paper to guess the name of the song and who originally sang in, and who remade it – explain song inspired name for 3 million year old skeleton Archaeology transparency on overhead – with class map the word petrifaction Read Aloud Anticipation Gallery Walk – facts about Lucy – give kids stickers to answer questions about Lucy (tell students she lived 3 million years ago and has helped archaeologists discover information about the ancient past) – write each statement on separate piece of paper - bring back in and string on clothesline across room – refer to during lesson Lucy was 25 years old when she died, but was the size someone in kindergarten would be today true false Men who lived during Lucy’s time used stones as tools true false Lucy’s head was the size of a baseball true false Scientists studied Lucy with less than ½ of her skeleton true false Lucy’s teeth were bigger than ours are true false Lucy was found in Ethiopia, which is in Africa true false (write each one of the questions above on a separate piece of paper w/2 columns true/false – kids put sticker under T or F) Direct Instruction Explain to kids that not only are they going to learn about pre-history humans today, but that they are also going to learn how to create concept maps and how they can help them study facts about history. 1) Create a concept map to explain PREHISTORY 2) Create a concept map for the “ologists” archaeologists - study the remains of ancient humans anthropologists - study human culture paleontologists - study fossils paleoanthropologists - study prehistoric remains - combine all the –ologies above example of concept map 3) Refer to gallery walk – explain to kids that all answers were true – give info about Lucy and her world on skeleton map Convince kids of the benefit of continually studying history - give example of the skull that was found that was hand-made! Wake-Up Students form large circle with teacher – teacher starts “I am Lucy and I was born 3 million years ago “ – next student says, “she is Lucy, was born 3 million years ago and (adds something else about Lucy) – continue around circle Review Complete Paragraph Practice Sheet – “describe Lucy” – do together as a class – use Lucy skeleton map for details – explain that when kids do research on a topic making a map can help them write their paper Ticket to Leave Be sure to have notebook, dividers and other class materials Lucy Map – write in info about Lucy on lines PARAGRAPH PRACTICE SHEET / NADZAK TOPIC: ____________________________ Student name _____________________ Date _____________ TOPIC SENTENCE: _________________________________________________________ DETAILS: Detail sentence # 1: ___________________________________ _______________________ _______________________ _______________________ _______________________ _______________________ _______________________ ___________________________________________ Detail sentence #2: ____________________________________ ____________________________________________ Detail sentence #3: ____________________________________ ____________________________________________ Detail sentence #4: ____________________________________ ____________________________________________ CLINCHER SENTENCE: _______________________________________________________ Write your entire paragraph here. Read it aloud as you re-write it. ____________________________________________________________________________________________________________ ____________________________________________________________________________________________________________ ____________________________________________________________________________________________________________ ____________________________________________________________________________________________________________ ___________________________________________________________________________________________________________ Time period 1.5 weeks CONTENT Geography & Prehistory Standard(s) Demonstrate understanding of social, political, geographic & economic changes that took place in Africa, Asia, Europe & the Americas LESSON TWO Bellringer Give each student a colored lifesaver and a tiny strip of paper as they enter the room – tell them not to eat the lifesaver yet! Use 5 different colors so kids can group according to color later. On board have instructions for them to pretend they found the lifesaver on an archaelogical dig and to write down one thing they would guess about it were an artifact and they didn’t know it was a lifesaver – collect in lunchbag Read Aloud Anticipation Pull out strips from lunch bag of lifesaver artifacts guesses and read to class – tell kids they’ll be learning more about pre-history humans Kids travel to desk groupings same color as lifesaver – tell kids there are several things in the bin that they will be using today – instruct them to each take out a small paper plate and several strips of paper Direct Instruction – more concept maps to make learning easier! Model the paper plate activity kids will be completing in groups by teaching them about the Neolithic Age – write Neolithic Age in the middle of a paper plate and in a circle on the overhead – students do same on their small plates – write facts about Neolithic Age on white strips and glue them to your plate and write on overhead – students do same Review / Extended learning Groups also have a big paper plate, colored strips and a typed info sheet on a kind of pre-historical man – together they are to create a concept map to share with class - all groups share info – kids write on Prehistoric Human Chart Complete paragraph practice sheet describing early man. Time period 1.5 weeks CONTENT Geography & Prehistory Standard(s) Demonstrate understanding of social, political, geographic & economic changes that took place in Africa, Asia, Europe & the Americas LESSON THREE Bellringer – make transparency for Numeracy big number bellringer Read Aloud Anticipation Put map of migrations of homo sapiens on overhead – have kids look under desk to see if sticker has been taped there – if so are volunteers to put sticker on overhead map (stickers will match squares of info on map below) Direct Instruction Give every student a piece of brown paper grocery bag – fold in fourths discuss social, political, geographic & economic changes – kids write one change in each section of paper bag – take notes Review/Extended Learning Travel to library - have kids crumple paper bags then smooth out and tape under tables in library – give kids each a paper towel and charcoal briquette – draw pictures that would tell future archaeologist about their lives Time period 1.5 weeks CONTENT Geography & Prehistory Standard(s) Demonstrate understanding of social, political, geographic & economic changes that took place in Africa, Asia, Europe & the Americas LESSON FOUR Bellringer – Technology Caveman Read Aloud Anticipation Index card pass – kids line up in 5 single file lines – write Maslow’s hierarchy of needs levels one per large 5 x 8 index card – give kids at beginning of line – they write a need they have, then pass back – trade cards among lines till kids have written on all cards – collect Direct Instruction Discuss Maslow’s hierarchy of needs – compare those of prehistory humans to modern man Direct students to take FOLDABLES materials out of bins – model how to create a foldable of Maslow’s hierarchy with construction paper – then give information about each level that kids write on their foldables Wake - Up Review / Extended learning Model bio-poem – students create their own based on their needs on Maslow’s hierarchy – share with class Create Venn Diagram to compare & contrast modern & prehistoric man’s levels Name _______________________ Global Studies Date ______________________ Hierarchy of Needs BIO-POEM Name Appreciative of ________________________ Feel a calling to _____________________________ Must _____________, ________________, & ________________ Respected by ________________________ Respected for ______________________________ Valuable because I’m _______________________ Belong to __________________ & ____________________ Lover of _______________, _________________, ________________ Secure in my ______________ & _________________ Safe when ____________________ & _______________________ Can’t live without _______________, _________________, & ____________________ Name Time period 1.5 weeks CONTENT Geography & Prehistory Standard(s) Demonstrate understanding of social, political, geographic & economic changes that took place in Africa, Asia, Europe & the Americas LESSON FIVE Bellringer Organize notebook according to list on overhead As they enter classroom, give every student a Popsicle stick with prehistory term or content on it – will use to group later Read Aloud Anticipation Group by like-popsicle sticks In group draw a map to show how to get from your classroom to cafeteria – include legend & scale Direct Instruction World geography skills – use atlas workbooks Wake-Up Review / Extended Learning PRE-HISTORY KNOWLEDGE BACKGROUND & INFO Read Aloud Ideas for this unit: Cowley, Marjorie. Dar and the Spear-Thrower A young Cro-Magnon boy living 15,000 years ago in southeastern France is initiated into manhood by his clan and sets off on a journey to trade his valuable fire rocks for an ivory spear thrower. Denzel, Justin. Boy of the Painted Cave. Forbidden to make images, 14 yr old Tao, a boy with a bad foot, yearns to be a cave painter, recording the figures of the rhinos, bison, and other animals of prehistoric times. These notes were cut & pasted and may have typos !!! WHAT IS PREHISTORY? Prehistory is the time before written language. It is a time we have to discover through archaeology, and sociology, because no one was able to write down what they were doing and how they were living. Although historians are usually referring to a time beyond the last 5000 years, many cultures developed in isolation, without written language. Some of these people might still be living in a prehistoric time. About 3 million year ago, the earth was populated with deer, giraffes, hyenas, cattle, sheep, goats, antelope, gazelles, horses, elephants, rhinoceroses, camels, ground squirrels, beavers, cave lions, ants, termites, porpoises, whales, dogs with huge teeth, and sabre-toothed tigers! Giant sharks, about 42 feet long, were plentiful. There were all kinds of birds and plants and fish, similar to birds, plants and fish today. (Dinosaurs, in case you missed the introduction, died out about 65 million years ago. They were long gone.) About this same time in history, around 3 million years ago, the higher primates, including apes and early man, first appeared. There was a difference between apes and man. Human-like hominids could stand upright. Apes could not. Their hands were different, too. Ape hands were made for climbing and clinging. Early man's hands were jointed differently, which allowed them to not only use tools, but to make tools. No one knows if these very early human-like people actually made tools, but remains of polished bones have been found in South Africa, which suggests they might have made simple digging tools from bone! Their diet was mostly vegetarian, along with some meat, probably obtained by scavenging. You might wonder how we know anything about hominids who lived over 3 million years ago! How do we know they even existed? Lucy told us! In 1974, a skeleton was found in Africa. The bones were those of young female, approximately 20 years old when she died. Scientists named this "young lady" Lucy. About 3 million years ago, when Lucy was alive, she was rather short, about 4 feet tall, and probably weighed about 50 pounds. Her brain was about the size of an orange or baseball (about onethird the size of the brain of a human Her bones showed she probably walked erect, although she still had the ability to climb trees easily. Lucy had a human like characteristic: her knee could lock, so she could stand up straight. Other apes did not have a locking knee, so they could not stand for long periods of time. There were no signs of broken bones or teeth marks that might show why she died. Scientists suspect that she probably fell into a lake or river and drowned. We don't know her real name, but the scientists who found her, Don Johnson, Tom Gray and their team, named her that, after the Beatles song Lucy in the sky with Diamonds. Calling her Lucy makes her more real to us. She was littler than your kindergartner, was about 25 years old when she died. Scientists were able to tell all of that from the skeleton, even though they didn't find all of it. AUSTRALOPITHECINES: (aw stray low PITH uh syns) These were Lucy's people. They are considered by scientists to be the first people and they lived between 3.75 million years ago and 1 million years ago. The name means southern apes. They probably didn't make tools, but might have made use of stones and other items they found to help them with their chores. They had low foreheads, large eyebrow ridges, flat noses and jutting jaws. Their jaws were more powerful than ours and the teeth were larger. It is thought that the men did the hunting and the women and children did the gathering. They believe the early people had more variety in their diets than we do. INTERESTING NOTE TO CONVINCE kids why we study history: Charles Dawson, an amateur archaeologist, and at another time, Sir Arthur Smith Woodward, found a human skull that had an ape's jaw. Scientists were so anxious to prove their long-held theory that about the missing link that they accepted it without even trying to verify it. It was called the Piltdown man, and it wasn't until 1953, when they realized some unknown person had created the skull, and it was shown to be false. Another example of why we have to keep rewriting the history and science books! HOMO HABIIS - 2.5 to 1.5 million years ago and the first people scientists agree are our direct ancestors. Their teeth and jaws were more like ours, and their brains were larger. Their name means handy human, named by the Leakeys because they made and used tools. They may also have made the first buildings, small round huts. First true humans - stone tools - the first tool-make - lived in Africa - taller, had a larger brainThis is the start of the Paleolithic Age, also called the Old Stone Age. HOMO ERECTUS - had even larger brains and more complex tools. The earliest people found outside Africa - the first erectus was found in Asia. These people get credit for inventing fire, very useful during the ice age. They are said to have had sloping foreheads, large eyebrow ridges, large jaws, flat faces, and no chin. The first hunters traveled over land bridges from Africa, to begin to populate the world, about 1 million years ago HOMO SAPIENS - meaning wise humans. These are the modern humans, arising when the homo erectus died out, with the first appearing about 150,000 years - we are homo sapiens, but there are some intermediate groups to appear here. Neanderthals, CroMagnons, you & me! NEANDERTHALS - the first homo sapiens. These people got named after the place they were first found: Neander Valley, in Germany. Once again, the brain is larger and the tools are more complex. They had bony ridges above their eyes, a protruding mouth and small chins. Because it was so cold, scientists guess they were the first to wear clothes all the time. They also built interesting houses: animal skins stretched over frames of branches or bones. Their tools were of flint and bone. Buried their dead with ceremony - stone-tipped spears, bone needles, bone fish hooks, sewed their clothes from animal skins, warm boots - In 1856, quarrymen made an exciting discovery in a cave in the Neander Valley, near Dusseldorf, Germany. They found the remains humans who were very different from us. Scientists later learned that "Neanderthal" humans inhabited Europe and parts of Asia and North Africa from about 125,000 to about 40,000 years ago. Fossils indicate that Neanderthals looked somewhat like humans, but they had heavy ridges above their eyes. Their skulls were larger than modern humans, indicating that they had bigger brains. Bones in the throats of Neanderthal fossils led archaeologists to believe that their verbal communication probably consisted only of grunts. They apparently could not use words they way we do today. Neanderthals lived side-by-side in many places with modern humans, then apparently became extinct. The mystery of what happened to the Neanderthals still puzzles scientists today. CRO-MAGNONS - the first people to look like us. The Homo sapiens sapiens who lived in Europe were called Cro-Magnon. Their fossils have been found in caves and date back 40,000 years. Cro-Magnons enjoyed art, just as we do today. They painted on rocks and the walls of their caves - carved, engraved, made sculptures and even made jewelry. They drew what was around them: people, plants and animals. The animals they drew tell us about the animals they saw, hunted and ate. Carved symbols tell us there might even have been the start of written language. They used fire to shape tools, and used tools to make other tools. They are thought to have had their own religions. They took care of their elderly and disabled people. Bow and arrows, well constructed huts with central hearths for fires; necklaces & pendants, cave art, little statues made from ivory, antler, bone; tools and weapons for hunting and fishing, oil lamps. Used honey to sweeten food. HOW DID THESE PEOPLE LIVE? Various groups probably developed their own traditions and customs, but we know, or think we know, something about the way people lived in general. Hunting and gathering, of course, was the means of getting food. There weren't any stores to go to. (Many children will find that hard to comprehend.) They probably lived in small groups of twenty or thirty people, moving around with the seasons. When a way of making fire, instead of waiting for lightening to create it was discovered, they were able to make better use of meat, and to survive in colder climates. FARMING changed everything. Eventually, if you always take from the earth, and never give back, supplies become limited. People learned to farm. We don't, of course have any idea how people came to realize it was possible to plant and grow, but eventually it happened. Once this discovery was made, it became possible for people to settle down and stay in one place. Ask your children to decide how people might have felt about this dramatic change in their lifestyles. Would everyone have felt the same way? Ask your children to write stories about this time in history. How was farming discovered? Who will make the decision to stay in one place and why? How will everyone feel? What kind of place should they choose to stay in? They will need a source of water, for example. What else will they need? People may have made the decision gradually. Perhaps they stopped because people were ill, or just because they liked a spot. Perhaps each year, they stayed a little longer, and eventually began creating nicer homes. After a time, they may have just stayed. Perhaps as they stayed longer, they worked to protect the animals needed for food, and even to create herds. Sheep, goats and dogs were some of the first animals domesticated (tamed). Farming changed the ways people lived. Since it didn't take the entire community to run the farms, some peple began to do other things, introducing specialization. Some might have just made tools. Others might have become builders. At first, this could have been a scary change. You had to trust that someone else would provide you with food in exchange for the tools you make. People had to take risks when they first chose not to grow food, or to stay home from the hunt. Farming changed the environment as well. Before hunting, all the land was available for plants to grow as they chose, and for animals to live in as they chose. Now trees and wild plants would have to be cleared to make room for the farms and communities. Wild animals had to be kept out of these locations permanently. This is still a problem we struggle with today, and you can make connections in science by studying deforestation (the clearing away of the forests) and extinction of animals. All of these changes took place during the Neolithic Age. Neolithic comes from the Greek words for new and stone. This was the new stone age, a major step towards the way most of us live today. People developed villages, and began trading with other nearby villages. Remember that there were now people who specailized, but perhaps they didn't have enough people to do everything, so they would trade with other villages which specialized in different things. The beginnings of villages, and the connections they make as the villages work out trade agreements and peace agreements lead to bigger connections. Soon cities develop, larger than the little clans, we first saw, larger than the villages that developed as people settled down. Civilizations require good leaders, an economic system, a good food supply that can even get you through times of poor crops, and a culture. They usually have varying levels of social class as well. Where in the past, everyone shared all they had, now some will have more than others, based on what they have to offer, their family background, their training, and their luck. Discuss these changes. how would people feel as things gradually began to change? Which system do they prefer? In an ancient civilization, what kinds of jobs would have been available? What job would they have wanted? Would they have been able to choose? Terms to Learn and for WORD WALL archaeology: finding and studying artifacts, ruins, bones, and fossils from the past. prehistory: history that occurred before the development of writing. artifact: items made by humans fossils: once-living plants or animals, or their imprints excavation: digging up artifacts, fossils and other items from the past. cultural dating: estimating the period from which an object came by comparing it to what you already know about various time periods. absolute dating: a method of cultural dating involving finding the date in years. This works only if you know for sure when certain objects were made or used. (For example, an "Elect Clinton In 1996" button would only have been made during that election.) Relative dating: the method of cultural dating used when you don't know exactly when it was made. You would compare it to other objects and decide it is older than this, but younger than that. Scientific Dating: analyzing an object in a laboratory using scientific methods in order to find the date. dendrochronology: tree ring counting, one of the oldest forms of scientific dating, used since the 1700s. Trees grow new rings every year, and the thickness is affected by climate. Radiocarbon dating: Living items take in carbon from the environment, and some of this is radioactive. When something dies, it stops taking in carbon, and begins losing it in a known pattern. By measuring how much radioactive carbon is left in an item, scientists can tell when something died. This only works on items more than 1000 years old and less than 60,000 years old, and is not entirely accurate then. MORE CONTENT KNOWLEDGE Migration At least 13,000 years ago, and perhaps thousands of years earlier, some humans crossed the Bering Strait from eastern Siberia into the Americas. Once in the Western Hemisphere, they spread from northern Canada to the southern end of South America within one or two thousand years. Some scholars have recently argued that humans accomplished this feat in as short a time as they did because they inhabited the western coast lands of the Americas, thrived on a rich marine diet, and migrated steadily southward in small boats. Fire changed almost every part of their lives. It provided warmth and light, and a way to cook food. It scared away larger animals. Fire also provided a place for hominids to gather to gather and form a community. The ability to control fire allowed the hominids to leave Africa and roam the rest of the world. Environmental Impact In Australia, Siberia, and the Americas, humans found many new species o f animals and plants. In these regions, animals had never encountered humans before and many species underestimated how dangerous this strange new two-legged creature was. Consequently, the first human colonists found hunting very easy. This may explain wh y many large animal species--the mammoths of Siberia, the giant wombats and emus of Australia, the saber-toothed tigers of the Americas--soon became extinct.Humans also learned to use fire to burn vegetation and encourage new plant growth, thereby attracting the plant-eating animals that they wanted to hunt. By regularly firing the land and by over-hunting, humans began to have a significant impact on the natural environment wherever they settled. Perhaps the most striking illustration of how dangerous mod ern humans could be was the disappearance of all other hominid species. Neanderthals, and perhaps some types of Homo erectus, survived throughout much of Big Era Two. They may even have met groups of Homo sapiens. Neanderthals had brains at least as large as ours, and they were effective hunters. But it seems they could not communicate with each nearly as well as modern humans could. As far as we know, the last Neanderthals lived in the south of France, perhaps 25,000 to 30,000 years ago. There are hints that they tried, and failed, to imitate the technologies of modern humans. Other hominids may have lived almost as recently in parts of Southeast Asia. We cannot know for certain, but it seems likely that, as modern humans occupied more and more territory, close genetic relatives living in those regions were slowly driven to extinction. By 10,000 years ago, humans could be found in all parts of the world, in Afroeurasia, Australia, and the Americas. As the area that humans occupied expanded, their numbers probably increased as well. Yet the size of each community likely remained small. In other words, population increased by extensification, that is, by increasing the number of communities and the range of settlement across the world without increasing the size of each community. Humans and Other Humans (social impact) Archaeologists can tell us a lot about their dwellings and the tools they used, but it is harder to understand their social and cultural lives. We are sure that v irtually all people were gatherers, hunters, or fishers in that era, even though the techniques people used varied more and more as groups settled more widely across the globe. Small groups banded together for protection and efficiency. The size of the group depended upon the amount of food available. Groups would disband and move on, as food required. Scientists are pretty sure that homo habilis built campfires. But they did not know how to make fire. Very importantly, Homo erectus man had fire-making skills. Like all new, major inventions, this discovery changed life dramatically. Why was the ability to able to make fire so important? As man had already discovered, most animals were afraid of fire, so a roaring campfire gave protection to the group or tribe. They no longer had to shelter out of the wind, unless they chose to do so. If their fire went out, they could relight it. They could choose where they camped. On a hot night, if they could find a relatively safe place, a breeze might feel good. Control of fire made moving into colder regions possible, as fire they could count on would provide them with warmth. It also changed the way they prepared food. These people began to cook their food consistently. Food that is cooked is more secure from disease and much softer to eat. As a result, it would have been easier for the young and the old to survive. Today's hunter-gatherer communities make up a minuscule percentage of the world's population, but they persist in a few places on all the continents. Exc ept in extremely cold environments, they rely mainly on gathered plants for subsistence. Meat is valued, and most communities have hunters who occasionally bring it in, but meat is not the main component of most hunter-gatherer diets because hunting is usually less reliable than gathering. Cave paintings and carved objects were just one of the ways that men and women expressed themselves symbolically through art. An early hint of the existence of art among humans is the physical evidence of powdered pigmen ts. People appear to have ground up pigments, such as ochre, and used them to paint themselves or their surroundings. In fact, evidence of ground pigment use in southern Africa dates to well over 100,000 years ago. Therefore, we may also have an early date for the use of language. In the last 40,000 years of the era, the period from about 50,000 to 10,000 years ago that scholars call the upper paleolithic, artistic expression burst forth in many parts of the world. Humans began to produce not only paintings and carvings but also necklaces, bracelets, pendants, beads, and ornamental headgear. Through this art women and men represented their world symbolically. Wherever people lived, they took advantage of the local mater ials and opportunities they had. Wall painting, for example, is concentrated heavily in northern Spain and Southwestern France where deep limestone caves provided "gallery space" protected from rain and wind. In Eastern Europe, by contrast, cave shelters a re rare, so people commonly carved small, portable figurines. Humans even started making music. For example, in western Eurasia archaeologists have found more than thirty flute -like instruments made of long hollow bone and equipped with finger holes. Most of these instruments are broken and unplayable, but the earliest may date to roughly 37,000 years ago. Abraham Maslow Most early psychologists studied people who had psychological problems, but Abraham Maslow studied successful people. Maslow decided that people want to be happy and loving, but they have particular needs that they must meet before they can act unselfishly. Maslow said that most people want more than they have. Once a person met their most basic needs, they would develop higher needs. Maslow said, “As one desire is satisfied, another pops up in its place.” Maslow created a hierachy of needs with five levels: Physiological needs - the need to breathe, regulate body temperature, need for water, sleep, to eat, and to dispose of bodily wastes Safety needs People feel unsafe during emergencies, or times of disorder like rioting. Children more commonly do not have this need met when they feel afraid. Security of employment, of revenues and resources, safety from violence, delinquency, aggressions, moral and physiological security, familial & health security Love and belonging needs - The need to escape loneliness and alienation, to give and receive love, and a sense of belonging. Friendship, family love, sexual love Esteem needs - The need to feel valuable. to have self-respect and the respect of others. If a person does not fulfil their esteem needs, they feel inferior, weak, helpless, and worthless. Self-actualization needs - Maslow taught that a very small group of people reach a level called self-actualization, where all of their needs are met. Maslow described selfactualization as a person’s finding their “calling.” He said, “a musician must make music, an artist must paint, and a poet must write.” They embrace the facts and realities of the world (including themselves) rather than denying or avoiding them. They are spontaneous in their ideas and actions. They are creative. They are interested in solving problems; this often includes the problems of others. Solving these problems is often a key focus in their lives. They feel a closeness to other people, and generally appreciate life. They have a system of morality that is fully internalized and independent of external authority. They judge others without prejudice, in a way that can be termed objective Many people confuse self-actualization with fame or fortune, but often this is not the case. While wealthy or celebrated people might reach self-actualization, many psychologists believe that most people who have reached the highest level of happiness are unknown beyond their circle of family and friends. Societies develop when people reach a particular level in Maslow’s hierarchy. Once people meet their physiological needs and they feel safe, they begin to develop a culture and an advanced civilization. Numeracy Bellringer We sometimes describe 1,100 as eleven hundred instead of one thousand, one hundred because it is easier to say. Just as 800 is 8x100, 1,100 is 11x100. A million is a thousand, thousand or 1000x1000. A billion is a thousand million and a trillion is a thousand billion. Scientists tell us the earth is 4.6 billion years old. That means it is 4,600,000,000 years old. We can also say that the earth is 4,600 million years old. If you wanted to count to 4.6 billion and each number took you one second to recite, you would be busy for 145.76 years, not including bathroom breaks. Here are some really large numbers: thousand 10^3 or 1,000 million 10^6 or 1,000,000 billion 10^9 or 1,000,000,000 trillion 10^12 or 1,000,000,000,000 quadrillion 10^15 or 1,000,000,000,000,000 quintillion 10^18 or 1,000,000,000,000,000,000 sextillion 10^21 or 1,000,000,000,000,000,000,000 septillion 10^24 or 1,000,000,000,000,000,000,000,000 octillion 10^27 or 1,000,000,000,000,000,000,000,000,000 nontillion 10^30 or 1,000,000,000,000,000,000,000,000,000,0 00 decillion 10^33 or 1,000,000,000,000,000,000,000,000,000,0 00,000 Global Pre-history Bellringer Technology is the tools and skills used to build things. Today we live in a world with amazing machines, but we can trace our modern tools to rocks. Early humans used stone tools, and those tools were the first technology. “Stone Age” humans used rocks as weapons, to break open things and to sharpen softer objects. About six thousand years ago, people slowly began to unlock the secrets of metals. They learned to smelt, or refine metal, by heating particular types of rocks. Copper was probably the first metal smelted, followed by tin, lead, and silver. Metal has many uses. You could mold metal into different shapes. Metal also conducted heat. Metal pans allowed people to cook meat and destroy harmful bacteria. Wood burns when heated and most rocks do not hold heat well. Iron was the most important metal to early cultures. People used the knowledge of iron to conquer others. The discovery of iron made it possible for the advancement of many civilizations in different parts of the world. What invention would you not be able to live without? Global Pre-history bellringer Archaeologists are scientists who study history. They often study fossils. Fossils are the remains of prehistoric plants or animals that somehow managed to be preserved for thousands of years. We have many unanswered questions because very few fossils have survived. Some fossils become petrified, which means they turn to stone. Petrifaction occurs when rivers and streams carry dissolved minerals to the porous parts of bones, shells or wood. The minerals eventually crystallize and settle, filling the pores. Archaeologists are like police detectives. They search for clues left behind by people, animals, and things. Archaeologists use those clues to make educated guesses about the past. What we know about prehistory changes over time as archaeologists uncover new clues. We don’t know what archaeologists will discover in the future. If the past is any guide, what we think we know about prehistory will change as we learn more about the past.