THE MARTIAN SUN-TIMES Florida Next Generation Sunshine State Standards Benchmark: SC.8.E.5.7 Compare and contrast the properties of objects in the Solar System including the Sun, planets, and moons to those of Earth, such as gravitational force, distance from the Sun, speed, movement, temperature, and atmospheric conditions. (Also assesses SC.8.E.5.4 and SC.8.E.5.8.). Background Information for the teacher: Sources: NASA.gov and http://nineplanets.org/mars.html Our Solar system is a part of a spiral galaxy called the Milky Way. It is comprised of our nearest star, the Sun, and the celestial bodies that surround it. There are eight (8) planets in our solar system – Pluto was downgraded to a dwarf planet in 2006 mainly because it orbits around the Sun in “zones of similar objects that can cross its path.” Pluto has a more distinguished recognition because dwarf planets orbiting the Sun beyond Neptune are referred to as plutoids. Of the eight remaining planets, there are four (4) inner “rocky” planets and four (4) outer “gas giants.” One of particular interest, is Mars. Mars (Greek: Ares) is the god of War. The planet probably got this name due to its red color; Mars is sometimes referred to as the Red Planet. (An interesting side note: the Roman god Mars was a god of agriculture before becoming associated with the Greek Ares; those in favor of colonizing and terraforming Mars may prefer this symbolism.) The name of the month March derives from Mars. Mars has been known since prehistoric times. Of course, it has been extensively studied with groundbased observatories. But even very large telescopes find Mars a difficult target, it's just too small. It is still a favorite of science fiction writers as the most favorable place in the Solar System (other than Earth!). Early in its history, Mars was much more like Earth. As with Earth almost all of its carbon dioxide was used up to form carbonate rocks. But lacking the Earth's plate tectonics, Mars is unable to recycle any of this carbon dioxide back into its atmosphere and so cannot sustain a significant greenhouse effect. The surface of Mars is therefore much colder than the Earth would be at that distance from the Sun. Materials: Computer with Internet access, various spherical objects of different sizes (i.e., basketball, softball, soccer ball, large marbles small marbles, beads, etc.) Objectives Students will: Explore the solar system Gather, interpret, and compare current weather information for Mars and Earth. Interpret and make inferences from data. Teacher note: Students are told that they are earthling weather/news reporters for an Internet newspaper called the Martian Sun-Times. They will write articles for the newspaper comparing weather and/or life on Mars and Earth. It is recommended that you assign a team to each investigation. It is possible for students to collect data and answer the questions in one period if there is a computer for each group. Another period will be necessary for them to discuss and write their article. Encourage students to use their factual information but to consider one of the following formats when writing their articles: travel brochure, human or Martian interest - story, fashion report, disaster report, weather predictions, etc. Students will be evaluated on the basis of effort, job performance, team participation and their literary contribution. Your role will be to answer questions for students and assist students in their interpretations. As always is the case, it's important for you to have done the investigations before teaching them. Occasionally, you may need to further explain some science concept found in the "Stats" sheets. Part 1: Solar System Sizes 1. As a class, discuss the actual size of our solar system – the planets, moons, and the Sun. Note that all of the measurements in the table below are in thousands, and even hundreds of thousands, of kilometers. 2. Using a spreadsheet program or calculator, begin to calculate the needed data in column 3. Once done, discuss these ratios as a class. 3. To complete column 4, set Earth’s diameter to the size of a large marble and recalculate the sizes based on the ratios in column 3. 4. Try to think of objects that correspond to the calculated sizes. Answers Diameter Compared with Earth's Scaled Diameters Scaled to… Earth=Large Marble (cm) Everyday Object Representing Solar System Body Solar System Body Equatorial Diameter (kilometers) Mercury 4,880 Small bead Venus 12,100 Large marble Earth 12,756 Mars 6,787 Small marble Jupiter 143,200 Basketball Saturn 120,000 Soccer ball Uranus 51,800 Softball Neptune 49,528 Softball Pluto (Dwarf planet) ~2,330 Moon 3,476 Tiny bead Sun 1,392,000 Epcot Ball??? (Very Large) 1 2.17 Source(s) www.perkins-observatory.org and www.flpromise.org Large Marble Tiny bead Student Worksheet Part 1: Solar System Sizes 1. As a class, discuss the actual size of our solar system – the planets, moons, and the Sun. Note that all of the measurements in the table below are in thousands, and even hundreds of thousands, of kilometers. 2. Working in groups of 3 students, use a spreadsheet program or calculator, begin to calculate the needed data in column 3. Divide each equatorial diameter by Earth’s diameter. Once done, discuss these ratios as a class. 3. To complete column 4, set Earth’s diameter to the size of a large marble and recalculate the sizes based on the ratios in column 3. (multiply Diameter compared with Earth x Earth’s Scaled Diameter) 4. Try to think of objects that correspond to the calculated sizes. 5. Arrange the planets in order, be sure to identify asteroid belt, inner planets, and outer planets. 6. Complete the discussion questions. Table 1: Ratio of the diameters of the other bodies compared with Earth's diameter. Solar System Body Equatorial Diameter (kilometers) Mercury 4,880 Venus 12,100 Earth 12,756 Mars 6,787 Jupiter 143,200 Saturn 120,000 Uranus 51,800 Neptune Pluto (Dwarf planet) Moon 49,528 ~2,330 Sun 1,392,000 Diameter Compared with Earth's Scaled Diameters 1 2.17 Scaled to… Earth=Large Marble (cm) 3,476 Discussion Questions 1. Identify the following: a. Inner planets b. Outer planets c. Dwarf planet d. Moon e. Star 2. Compare and contrast the sizes of the planets, moon, and stars Everyday Object Representing Solar System Body Large Marble Part 2 - Solar System Distance Scale Model Objective: Students will use mathematical equations, measuring tools and skills to create an accurate scale model of the solar system. Background Information: Distances in space can sometimes be hard to imagine because space is so vast. Think about measuring the following objects: a textbook, the classroom door, or the distance from your house to school. You would probably have to use different units of measurement. In order to measure long distances on Earth, we would use kilometers. But larger units are required for measuring distances in space. One astronomical unit equals 150 million km (1 AU = 150,000,000 km), which is the average distance from the Earth to the Sun. Materials: - receipt paper rolls (adding machine tape) or old VHS tape - meter stick - metric ruler - markers or colored pencils - scissors Engage: Ask students to brainstorm about all of the objects that they have seen or observed in the night sky. Then discuss with the class how far away they think these objects (stars, planets, or satellites) are. Reinforce to students that there are planets much closer to the Earth than stars other than our Sun. Explore 1. As a class, decide what scale you will use to determine your measured distance from the Earth to the Sun. This measurement will represent one Astronomical Unit (AU); (Ex: 10 cm = 1 AU). 2. Multiply your chosen AU standard by 40 to determine the length of adding machine tape needed to complete your scale model activity. (10 cm x 40 = 400 cm of tape). 3. Place your values in Table 2. 4. Cut the adding machine tape to the appropriate length. Note: If you would like to include the Sun and Asteroid Belt, be sure to cut extra length (5 cm – 7cm should be adequate) at the start of your distance scale model. Students should also consider that the Sun’s size will not be to scale. 5. Mark one end of the tape to represent the Sun. 6. Measure from the edge of your group’s drawn sun the distances for each planet. Place a dot where each planet should be placed. Include your scale on the model. 7. Once all of the planets have mapped out, each group member should choose one or two planets to draw and color. Use your textbook or materials provided by your teacher as a reference. PLANET TABLE 2: Scaled Distances of Planets Distance from the Standard-Scale Sun in (chosen by Astronomical class/group) Units (AU) AU x scale unit Mercury 0.4 Venus 0.7 Earth 1.0 Mars 1.5 Jupiter 5.2 Saturn 9.5 Uranus 19.5 Neptune 30.2 Pluto (Dwarf Planet) 40 Distance of Planet in the chosen scale. (cm) Results and Conclusions: 1. Why do you think scale models are important? 2. Why were you instructed to multiply the distances in AU by 40 to determine how long your scale model needed to be? 3. Compare and contrast the distances of the inner and outer planets from the sun Extension: 1) Draw the planets by scale according to size (diameter) on the distance scale model. 2) Research other celestial bodies in the universe (other known stars and galaxies). Using AU and units such as a light year, include these in you distance scale model. Part 3 - Martian Sun Times Reporters Teacher’s Procedure: 1. Divide the class into seven different groups. Each person within the group will be assigned a specific job, e.g. secretary, researcher(s), editor, organizer. 2. Assign to each group one of the investigations to research. Use the factual information obtained to prepare an article. This may consist of anyone of a variety of formats, e.g., a newspaper article, a travel brochure, a human –interest (or Martian interest) story, a fashion report, weather predictions. Student Procedure: 1. Your group will be assigned an investigation to research and present to class. 2. Use the factual information obtained to prepare an article. This may consist of anyone of a variety of formats, e.g., a newspaper article, a travel brochure, a human –interest (or Martian interest) story, a fashion report, weather predictions. 3. Each person within the group will be assigned a specific job, e.g. secretary, researcher(s), editor, organizer. Summary of Investigations: Investigation I: Weather Forecasts for Earthlings and Martians. (Comparing weather for Mars and where you live). Compare temperatures and wind speeds on Mars and on Earth where you live, as well as noting the temperature ranges across the two planets. Investigation II : A Martian Summer Day (Comparing temperatures for summer on Mars and the place you live) Research the typical high and low summer temperatures for Mars. Compare temperatures for the current date on Mars and Earth based upon 30° N latitude. Investigation III: Stormy Mars: Dust Gets In My Eyes (Finding out about dust storms on Mars). Discover the effect of Martian dust storms on temperatures. Find out what might cause the storms and infer the length of one storm. Investigation IV: Probing Earth and Mars: What Should We Pack? (Finding out temperatures at various landing sites) If MASA (Martian Aeronautics and Space Administration) sent astronauts to Earth to places that match the latitude and longitude of Viking and Pathfinder landing sites, where would they land and what weather conditions would they encounter? Investigation V: Life on Mars: Where's the Party? (Finding out about the possibility of life on Mars) Learn about the Martian meteorite that may show evidence of life there. Are any temperatures on Mars similar to Earth? Considering the environment of Mars what, would a Martian look like? Investigation VI: Getting to Mars: Are We There Yet? (Finding out about Mars' orbit and NASA Missions) Learn about planetary orbits and interplanetary travel. How long would a trip from Earth to Mars take? What are some of the next Martian missions planned? Investigation VII: Exploring Mars: Oh Water, Where Art Thou? (Finding out about water on Mars) Early observers of Mars thought they saw canals on the planet. There are no canals, but there is a lot of evidence of once– abundant water on Mars. Students will see current Mars images and compare them to water– formed features on Earth. Extension: 1. Allow students to imagine that they are living on one of the planets other than Earth. They must assume the role of a travel agent who is trying to attract visitors to their home world. They must create an Interplanetary Travel Brochure. Resources: http://www.ucls.uchicago.edu/MartianSunTimes/index.html) http://www.nineplanets.org/mars.html IMAGINARY ALIEN LIFE FORMS Adapted from Mars Critters http://solarsystem.nasa.gov/educ/docs/Mars_Critters.pdf and Solar System Activities: Search for a Habitable Planet http://solarsystem.nasa.gov/docs/modelingsolarsystem_20070112.pdf Florida Next Generation Sunshine State Standards Benchmark: SC.8.E.5.7 Compare and contrast the properties of objects in the Solar System including the Sun, planets, and moons to those of Earth, such as gravitational force, distance from the Sun, speed, movement, temperature, and atmospheric conditions. (Also assesses SC.8.E.5.4 and SC.8.E.5.8.); SC.7.L.15.2 Explore the scientific theory of evolution by recognizing and explaining ways in which genetic variation and environmental factors contribute to evolution by natural selection and diversity of organisms. (Also assesses SC.7.L.15.1 and SC.7.L.15.3.) SC.7.L.16.2 Determine the probabilities for genotype and phenotype combinations using Punnett Squares and pedigrees. About This Activity In groups or as individuals, students will use their knowledge of Mars and living organisms to construct a model of a plant or animal that has the critical features for survival on Mars. This is a “what if” type of activity that encourages the students to apply knowledge. They will attempt to answer the question: What would an organism need to be like in order to live in the harsh Mars environment? Objectives Students will: • draw logical conclusions about conditions on Mars. • predict the type of organism that might survive on Mars. • use a punnett square to predict offspring genotupe and phenotype • construct a model of a possible martian life form. • write a description of the life form and its living conditions focusing on necessary structural adaptations for survival. Background To construct a critter model, students must know about the environment of Mars. The creature must fit into the ecology of a barren dry wasteland with extremes in temperature. The atmosphere is much thinner than the Earth’s; therefore, special adaptations would be necessary to handle the constant radiation on the surface of Mars. Also the dominant gas in the Mars atmosphere is carbon dioxide with very little oxygen. The gravitational pull is just over 1/3rd (0.38) of Earth’s. In addition, Mars has very strong winds causing tremendous dust storms. Another requirement for life is food—there are no plants or animals on the surface of Mars to serve as food! Scientists are finding organisms on Earth that live in extreme conditions previously thought not able to support life. Some of these extreme environments include: the harsh, dry, cold valleys of Antarctica, the ocean depths with high pressures and no sunlight, and deep rock formations where organisms have no contact with organic material or sunlight from the surface. Vocabulary ecology, adaptations, gravity, geology, atmosphere, radiation exposure, weather, environment, genotype, phenotype Part 1 Materials paper (construction, tag board, bulletin board, etc.) colored pencils glue items to decorate critter (rice, macaroni, glitter, cereal, candy, yarn, string, beads, etc.) pictures of living organisms from Earth Student Sheet, Mars Critters Student Sheet - Activity 1, If You Went to Mars Mars Fact Sheet (pg. 56) Procedure Advanced Preparation Gather materials. Set up various art supplies at each table for either individual work or small group work. This activity may be used as a homework project. Review the “If You Went to Mars” sheet, Mars Fact Sheet, and the background provided above along with the research conducted in the Martian Sun-Times activity or other desired research. Classroom Procedure 1. Ask students to work in groups to construct a model of an animal or plant that has features that might allow it to live on or near the surface of Mars. 2. Have them consider all the special adaptations they see in animals and plants here on Earth. 3. They must use their knowledge of conditions on Mars, consulting the Mars Fact Sheet, If You Went to Mars, and other resources such as web pages if necessary. Some key words for a web search might be “life in space” or “extremophile” (organisms living in extreme environments). 4. They must identify a specific set of conditions under which this organism might live. Encourage the students to use creativity and imagination in their descriptions and models. 5. If this is assigned as homework, provide each student with a set of rules and a grading sheet, or read the rules and grading criteria aloud and post a copy. 6. Review the information already learned about Mars in previous lessons. 7. Remind the students that there are no wrong critters as long as the grading criteria are followed. 8. Include a scale with each living organism. 9. Students select two different organisms that will mate. 10. Revisit/Introduce Genetics:: Select one trait, the height of the “Mars Critter,” and generate a punnett square to predict the genotype (genetic make-up) and phenotype (physical characteristics) of the offspring that the two organisms would produce, if mated. Students will learn more about this in upcoming topics. For simplicity – tell students that the height trait will have a paired allele, each parent giving one possible allele to the offspring and tall is dominant and expressed in the offspring when present. Complete a sample punnett square, as a reminder. Advanced students may explore incomplete dominance. As an extension, mate offspring and/or generate punnett squares for other characteristics. Genotype TT (dominant tall) tt (recessive short) Tt (mixed hybrid) Phenotype Tall Short Tall Teacher Guide Source: www.exploringnature.org/db/detail.php?dbID=22&detID=2290 7. Suppose two Mar’s critters mated. One was Tall and the other was short. Using a punnett square, predict the offspring’s possible heredity of the tall gene. Each parent has two alleles for the height gene. Dad is homozygous tall (TT) and mom is short (tt). Predict the genotype (genetic make-up) and phenotype (physical characteristics) for the offspring Dad Genotype: _____% TT ____% tt ____% Tt Phenotype: : ______% Tall ______% short Genotype TT (homozygous tall) tt (homozygous short) Tt (heterozygous) Phenotype Tall Short Tall Offspring Mom Part 2: Search for a Habitable Planet Florida Sunshine State Standards Benchmark: SC.E.1.3.1 The student understands the vast size of our Solar System and the relationship of the planets and their satellites. SC.F.2.3.3: AA (Also assesses F.2.3.4 & G.1.3.2) The student knows that generally organisms in a population live long enough to reproduce because they have survival characteristics. Objective: This lesson focuses on characteristics of planets that make them habitable. Living creatures need food to eat, gas to breathe, and a surface that provides a comfortable temperature, gravity, and place to move around. These requirements are related to what the planet’s surface and atmosphere are made of, and how large (gravity) and close to the Sun (temperature) the planet is located. The inner planets are small (low gravity), relatively warm, and made of solid rock. Some of them have atmospheres. The outer planets are large (high gravity), cold, and made of gaseous and liquid hydrogen and helium. A creature that might be comfortable on a gas giant would not be comfortable on a small rocky planet and vise versa. Vocabulary: habitable, life requirements, planet characteristics, surface and atmospheric composition (chemical examples) Time Required: One to two 45 minute class periods Materials: Creature Cards Solar System Images and Script Planet Characteristics Table Students will define the life requirements of a variety of creatures and learn that these relate to measurable characteristics of planets the creatures might inhabit. By evaluating these characteristics, students discover that Earth is the only natural home for us in our solar system and that Mars is the next most likely home for life as we know it. Procedures Activity 1. Define Habitability and Design Creatures This lesson has students take the places of extraterrestrial creatures exploring our solar system in search of new homes. They define creature life requirements and relate them to planet characteristics in order to choose homes. Several of these creatures have life requirements quite unlike life as we know it, where water and carbon are essential, and some are downright impossible. The goals here are not to study biochemistry, but habitability of planets. Bizarre creatures had to be invented for them to find homes on some of the planets in our solar system. Another goal is to encourage creativity and teamwork in designing creatures and selecting planets. This activity is one that is outside of the box. ENGAGE 1. Set the stage by reading introduction: We are space travelers from a distant star system. The crew of our spaceship includes six different types of creatures who live on different planets in that star system. Our star is expanding and getting very hot. Our home planets are heating up and soon we will need new places to live. It is our mission to find habitable planets for our six different types of creatures with different life requirements. In all we need to find new homes for five billion inhabitants. First we need to know what makes a planet habitable so we can set up probes to measure the characteristics of various planets. The different requirements for life can be related to measurable planetary characteristics. What do creatures require to live? EXPLORE 2. Brainstorm on requirements and characteristics. Lead the students in producing a table similar to the one below. Encourage free-thinking, there aren't specific right answers, but lead students to the following topics, among others. Life requirements food to eat gas to breathe comfortable temperature ability to move Planet characteristics surface & atmosphere composition atmosphere composition temperature range surface type (solid, liquid, gas) gravity size 3. Ask students what kinds of probes might be used to measure these characteristics. Answers may range from general to specific and may be based on science fiction. Examples may include cameras, radar, thermometers, and devises to measure magnetics, altitude, and light in all wavelengths from radio waves, through infrared, ultraviolet, and X-ray to gamma-ray. [Secondary school classes might do one of the excellent activities on the electromagnetic spectrum or activities related to solar system missions.] 4. Divide students into six or more teams (more than one group can design the same creature). Explain that each team represents one of the six different types of creatures on our mission. Today we will make models of creatures having specific life requirements. Later we will collect data on a new planetary system in order to search for new homes. 5. Distribute one creature card to each team. Each card contains the information on a single line A-F below. Tell students that each team is supposed to create a creature that fits the characteristics on their creature card. Students may select art supplies (or drawing supplies) and should be able to complete their creatures in approximately 15-20 minutes. Students will name their creature ambassador and be ready to introduce it to the class. Encourage teamwork and creativity. [Teacher, you may get questions on some of the food or gases. Handle these as they come, but do not provide this vocabulary ahead of time unless it comes up during brainstorming. Simply explain that they are various chemical elements or compounds. They are needed only for matching with planetary characteristics and should not be tested vocabulary.] 6. Ask each team to introduce their creature ambassador and to explain their creature's needs and any specific features of the model. This will take longer than you expect because students really get involved with their creatures. Creature A B C D E F Food helium rock carbon methane water carbon Breathes hydrogen carbon dioxide oxygen hydrogen carbon dioxide oxygen Motion flies flies walks swims walks swims Temperature cold hot moderate cold moderate moderate Assessment: Evaluate team presentations and collect descriptions of how their creature meets its life requirements. EXPLAIN Activity 2. Tour solar system and evaluate for habitability 1. Prepare students for solar system tour. Tell students that they will have to take notes on the planets to report back later. Students will work in the same teams as when they made creatures. The grade level/ability will determine how the teacher structures the information gathering. Each team may record the information on all planets or on just one or two planets. Young students may simply compare planet characteristics to those on their creature cards and check off boxes of matching characteristics on the planet chart. 2. Distribute copies of the blank planet characteristics chart or put it on the blackboard/overhead. Show slides/photos of the planets and read the text provided below. For elementary students, exclude the data in parentheses. For secondary students, include the data. As you tour the planets, it may be necessary to repeat each section twice for younger students to get enough information to report. 3. Compile information on overhead or blackboard planet characteristics chart as teams report data they recorded on planet (size, surface type, composition, atmosphere and temperature). Attached table gives suggested answers. Students will probably be able to name the planets, but this is not a test. Alternatively, each student could fill in a chart to allow evaluation of listening skills. Also, students could work cooperatively to complete one chart per team. 4. Have teams compare the characteristics chart on the planets with the creature requirements on their creature card. Decide which planets (if any) would be suitable homes for their creature. Report their choices orally and explain, if necessary. Tabulate on the blackboard. Creature A B C, F D E Planet(s) 4, 5 (Saturn and Jupiter), but also 2,3 (Neptune and Uranus) 8 (Venus) 7 (Earth) 2,3 (Neptune and Uranus) 6 (Mars) No creatures can live on planets 1 or 9 (Mercury or Pluto) 5. Ask students to create a finale or read the finale below. Now that the creatures have evaluated habitable planets we will send down spaceships to check out the surfaces in detail. Creatures A, B, D and E find uninhabited planets that are just suited to their needs. They decide to settle on their chosen planets. Creatures C and F are both interested in the same planet. Creature F finds the salt water to be a perfect home for it, while creature C finds the land to be overpopulated and polluted. They decide that there isn't room for one billion more inhabitants and decide to look for a habitable planet in another solar system. Assessment: Collect Planet Characteristics tables and compare with the suggested answers above. Do not require a perfect match, but allow students to think critically and creatively. Allow adaptations of the environment (such as turning water into hydrogen and oxygen) and other reasonable modifications. EVALUATE Writing assignment: Ask students to write a paragraph explaining why the planet they found will or will not be suitable for their creature. The paragraph could be in the form of a news report to be sent back to their dying solar system. CREATURE CARDS We are space travelers from a distant star system. The crew of our spaceship includes six different types of creatures who live on different planets in that star system. Our star is expanding and getting very hot. Our home planets are heating up and soon we will need new places to live. It is our mission to find habitable planets for our six different types of creatures with different life requirements. In all we need to find new homes for five billion inhabitants. Your task 1) Design a creature that fits the following needs for life. 2) Give it a name. and 3) Introduce it to the class and explain how it meets its needs for life. Creature A Food Helium Breathes Motion Hydrogen Flies Temperature Cold We are space travelers from a distant star system. The crew of our spaceship includes six different types of creatures who live on different planets in that star system. Our star is expanding and getting very hot. Our home planets are heating up and soon we will need new places to live. It is our mission to find habitable planets for our six different types of creatures with different life requirements. In all we need to find new homes for five billion inhabitants. Your task 1) Design a creature that fits the following needs for life. 2) Give it a name. and 3) Introduce it to the class and explain how it meets its needs for life. Creature B Food Breathes Motion Temperature Rock Carbon dioxide Flies Hot We are space travelers from a distant star system. The crew of our spaceship includes six different types of creatures who live on different planets in that star system. Our star is expanding and getting very hot. Our home planets are heating up and soon we will need new places to live. It is our mission to find habitable planets for our six different types of creatures with different life requirements. In all we need to find new homes for five billion inhabitants. Your task 1) Design a creature that fits the following needs for life. 2) Give it a name. and 3) Introduce it to the class and explain how it meets its needs for life. Creature C Food Breathes Motion Temperature Carbon Oxygen Walks Moderate We are space travelers from a distant star system. The crew of our spaceship includes six different types of creatures who live on different planets in that star system. Our star is expanding and getting very hot. Our home planets are heating up and soon we will need new places to live. It is our mission to find habitable planets for our six different types of creatures with different life requirements. In all we need to find new homes for five billion inhabitants. Your task 1) Design a creature that fits the following needs for life. 2) Give it a name. and 3) Introduce it to the class and explain how it meets its needs for life. Creature D Food Breathes Motion Temperature Methane Hydrogen Swims Cold We are space travelers from a distant star system. The crew of our spaceship includes six different types of creatures who live on different planets in that star system. Our star is expanding and getting very hot. Our home planets are heating up and soon we will need new places to live. It is our mission to find habitable planets for our six different types of creatures with different life requirements. In all we need to find new homes for five billion inhabitants. Your task 1) Design a creature that fits the following needs for life. 2) Give it a name. and 3) Introduce it to the class and explain how it meets its needs for life. Creature E Food Breathes Motion Temperature Water Carbon Dioxide Walks Moderate We are space travelers from a distant star system. The crew of our spaceship includes six different types of creatures who live on different planets in that star system. Our star is expanding and getting very hot. Our home planets are heating up and soon we will need new places to live. It is our mission to find habitable planets for our six different types of creatures with different life requirements. In all we need to find new homes for five billion inhabitants. Your task 1) Design a creature that fits the following needs for life. 2) Give it a name. and 3) Introduce it to the class and explain how it meets its needs for life. Creature F Food Breathes Motion Temperature Carbon Oxygen Swims Cold Search for a Habitable Planet Solar System Images and Script PLANET CHARACTERISTICS (Teacher Key) Size Surface Type and Composition Atmosphere Temperature Name 1 tiny 2350 km solid rock, methane ice none (methane) very cold -230 C 2 medium large 49,500 km liquid hydrogen, helium thick hydrogen, helium, methane very cold 220 C - Neptune 3 medium large 51,100 km liquid hydrogen, helium thick hydrogen, helium, methane very cold 210 C - Uranus 4 large 120,500 km liquid hydrogen thick hydrogen, helium cold -180 C Saturn 5 very large 143,000 km liquid hydrogen thick hydrogen, helium cold -150 C Jupiter 6 small km solid rock, water ice thin carbon dioxide moderate -23 C Mars 7 medium small 12,756 km solid rock, liquid water, carbon compounds medium nitrogen, oxygen moderate 21 C Earth 8 medium small 12,100 km solid rock thick carbon dioxide very hot 480 C Venus 9 tiny 4878 km solid rock none (helium) variable range 180 to 400 C Mercury 6786 Pluto PLANET CHARACTERISTICS Student Sheet Size 1 2 3 4 5 6 7 8 9 Surface Type and Composition Atmosphere Temperature Name