© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Plans Chapter 2: Weather and Us Total number of periods: 12 periods Overview of Lesson Plans What Is the Weather Like Today? (2 periods) Lesson Specific Instructional Objectives 2.1 Pupils should: be able to observe the weather Cambridge Primary Scientific Enquiry Skills Collect evidence by making observations when trying to answer a science question. (2Ep1) Process Skills Observing Hypothesising Measuring Comparing Use first-hand experience, e.g. observe the weather. (2Ep2) How Do We Describe the Weather? (3 periods) Lesson Specific Instructional Objectives 2.2 Pupils should: be able to describe the weather Cambridge Primary Scientific Enquiry Skills Collect evidence by making observations when trying to answer a science question. (2Ep1) Use first-hand experience, e.g. observe weather signs. (2Ep2) Use simple information sources. (2Ep3) Predict what will happen before deciding what to do. (2Ep5) Talk about risks and how to avoid danger. (2Eo2) Process Skills Communicating Analysing Comparing Observing Inferring 21st Century Skills Apply technology effectively Communicate clearly Be self-directed learners Work independently 21st Century Skills Use systems thinking Reason effectively Environmental literacy Collaborate with others Apply technology effectively Be self-directed learners Make judgements and decisions Communicate clearly Number of Periods 2 Number of Periods 3 Page 1 of 15 © 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans How Does the Weather Affect Plants and Animals? (4 periods) Lesson Specific Instructional Objectives Cambridge Primary Scientific Enquiry Skills 2.3 Pupils should: be able to understand how weather affects different plants and animals in their local environments Collect evidence by making observations when trying to answer a science question. (2Ep1) Process Skills Observing Comparing Analysing 21st Century Skills Use systems thinking Number of Periods 4 Use first-hand experience, e.g. observe the weather. (2Ep2) Use simple information sources. (2Ep3) Make comparisons. (2Eo6) How Can We Predict the Weather? (3 periods) Lesson Specific Instructional Objectives 2.4 Pupils should: be able to observe and record weather data Cambridge Primary Scientific Enquiry Skills Collect evidence by making observations when trying to answer a science question. (2Ep1) Use first-hand experience, e.g. observe the weather. (2Ep2) Process Skills Measuring Analysing Predicting 21st Century Skills Communicate clearly Collaborate with others Be self-directed learners Manage projects Think creatively Number of Periods 3 Make and record observations. (2Eo3) Take simple measurements. (2Eo4) Identify simple patterns and associations. (2Eo7) Page 2 of 15 © 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Main Lesson Plans Lesson 2.1 BSCS 5E Engage: Chapter starts with an interesting situation in the cartoon Lesson Notes Chapter opener Teaching Tip: Go through the comic strip and discuss the different types of weather that Rita is experiencing. Resources Textbook page 27 Ask pupils: What kind of weather is Rita experiencing in each scene? (Answer: Sunny; windy; rainy; sunny (with rainbow)) How can you tell if it is sunny, cloudy, rainy or windy? (Allow pupils to respond freely.) What Will I Learn? Emphasise to pupils what their learning journey will be like for this chapter. Observe and describe the weather. Weather data can be recorded. Weather affects different plants and animals in their local environments. Textbook page 28 What Is the Weather Like Today? Ask pupils: What are the different types of weather? (Allow pupils to respond freely.) What are some words linked to weather? (Allow pupils to respond freely.) Tell pupils that these questions will be answered in this chapter. Explore: Pupils learn about the weather by watching videos Teaching Tip: Play the videos of weather songs in class. Ask pupils to talk about the types of weather mentioned in the songs. URLs 2.1, 2.2 21st Century Skill: Apply technology effectively Explain that: There are clues that can tell us more about the weather of the day. Teaching Tip: Get pupils to talk about what they think are the clues that tell us more about weather. List them on the board. Clouds Background: When water gains heat from the Sun and evaporates, it turns into water vapour and rises into the Textbook page 29 Page 3 of 15 © 2012 Alston Publishing House Pte Ltd BSCS 5E Elaborate: Lesson is enhanced with further description and simple activity Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Notes sky. When water vapour meets the cooler air higher in the atmosphere, it loses heat and condenses into tiny water droplets, forming clouds. Resources Teaching Tips: 1. Tell pupils that clouds are tiny droplets of water in the sky. Get pupils to look out of the windows and see if they can spot any clouds. Introduce words like ‘thin’ and ‘wispy’, ‘thick’ and ‘puffy’. (Wispy — thin or faint; Puffy — rounded, ball-like appearance) Ask pupils to describe the clouds in the sky including their colour, shape, and position in the sky. 2. You can read the following poem to the class. Clouds by Jenny Bryant Clouds are fluffy, Friendly, Free. Sun is shining through at me. Clouds are heavy, Angry, Gray. Rain pouring down all day. Ask pupils: Why are clouds fluffy and friendly at first, and heavy and angry later? (Answer: Different types of clouds indicate different kinds of weather.) Alternatively, you can read Little Cloud by Eric Carle. Teaching Tip: Go through the text in Discover More! for more information about what clouds can tell us. URL 2.3 Textbook page 30 Project Idea: Get pupils to do research using the Internet or from the library on the different kinds of clouds. They can then recreate the cloud forms using cotton wool on construction paper. Display their work in class. 21st Century Skills: Apply technology effectively; Work independently; Be self-directed learners Page 4 of 15 © 2012 Alston Publishing House Pte Ltd BSCS 5E Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Notes Resources Wind Background: Wind is moving air. It is produced by the uneven heating of the Earth’s surface by the Sun. Warm air, which is less dense than cold air, rises. Cool air rushes in to replace the rising warm air. This movement of air is what makes the wind blow. Explain: The concept is explained with examples Evaluate: Pupils apply their understanding by contributing suggestions Explain that: Wind is moving air. We can feel the wind but we cannot see it. The wind can do work, such as turn pinwheels, toss leaves in the air, push clouds across the sky, wear away rocks or reshape land. Teaching Tips: 1. Show pupils pictures of places that have their shapes changed by wind, e.g. sand dunes. 2. Get pupils to suggest ways to find out which direction the wind is blowing. For example, let go of a leaf in the air and see which direction it floats away in. Test out their suggestions. Process Skills: Observing, Hypothesising 21st Century Skill: Be self-directed learners Activity: Play the game ‘Blow, wind, blow!’ in the school field. Get pupils to form a circle and hold hands. Choose one pupil to stand in the middle of the circle and call out “Blow, wind, blow!” The rest of the pupils should reply in unison, “Blow what?” Then the pupil will pick a trait such as “Blow all those who are wearing glasses/watches/have a ‘k’ in their names.” The pupils who have these traits should move out of their current position and find another position. The pupil in the middle will quickly find himself a vacant position. The pupil who is left without a place will stand in the middle of the circle to continue the game. 21st Century Skill: Communicate clearly Temperature Background: Temperature is a measure of hotness or coldness. For weather measurement, it is the temperature of the air or atmosphere that we want to find out. Temperature can be measured in the units degrees Celsius or degrees Fahrenheit. Textbook page 31 Teaching Tip: Bring a thermometer to class. You may also use a fridge magnet that carries a thermometer for reading room temperature. Familiarise pupils with the thermometer so that they know how to read temperature Page 5 of 15 © 2012 Alston Publishing House Pte Ltd BSCS 5E Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Notes Resources from it. Get pupils to read the temperature of the day using the thermometer. Ask pupils if it is a hot or cool day. Process Skill: Measuring Ask pupils: What is a thermometer used for? (Answer: To measure temperature.) Explain that: The thermometer is used for measuring temperature. Temperature is a measure of hotness or coldness. Elaborate: Examples of other countries are given Teaching Tip: Share that, in some cold countries, the temperature is so low (below 0 °C), that water freezes into ice. In some hot countries, temperatures can be as high as 45 °C. Workbook page 15 Activity 1: What Is the Weather Like? Show pupils pictures of people in the two scenarios mentioned above. Ask pupils to guess which is which. Consolidation Worksheet 1 Process Skills: Observing, Comparing Internet links for Lesson 2.1 URL 2.1: How’s the weather? Song and cartoon for kids http://www.youtube.com/watch?v=b18TDfk5Ppw&feature=related URL 2.2: The weather song http://www.youtube.com/watch?v=3Ja4j4ltnRw&feature=related URL 2.3: Little Cloud by Eric Carle http://www.youtube.com/watch?v=wGrGjkPiCmc Page 6 of 15 © 2012 Alston Publishing House Pte Ltd Lesson 2.2 BSCS 5E Engage: A familiar situation is used to introduce the concept Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Notes How Do We Describe the Weather? Sunny day Teaching Tip: Discuss what a sunny day is like. Lead pupils to use words such as ‘hot’, ‘bright’, ‘the Sun is shining’ etc. Resources Textbook page 32 Get pupils to talk about the clothes they would wear and activities they would carry out during sunny weather. Teaching Strategy: Relating to real life Process Skill: Communicating 21st Century Skill: Use systems thinking Cloudy day Teaching Tip: Discuss what a cloudy day is like. Tell pupils that when clouds cover the Sun, less of the Sun’s heat and light pass through. Hence, it is less bright and less hot. Textbook page 33 Ask pupils to compare the temperature on a cloudy day to the temperature on a sunny day. Ask pupils to infer why the air temperature is lower on a cloudy day. Process Skills: Analysing, Comparing 21st Century Skill: Reason effectively Activity: Bring pupils out to spend some time outdoors in the field on a cloudy day to look at the clouds. Process Skill: Observing Windy day Background: Wind carries energy and exerts a force. In some countries, wind is used to do work, for example, to turn windmills and produce energy. Explain: The different winds are explained Textbook page 34 Teaching Tip: Discuss what a windy day is like. Introduce the word ‘breeze’ to describe a light wind. Point out that wind can be of different strengths. Very strong winds can cause a lot of damage. Page 7 of 15 © 2012 Alston Publishing House Pte Ltd BSCS 5E Elaborate: Pupils find out more by doing project work Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Notes Project Idea: Get pupils into groups to find out more about tornadoes and hurricanes by doing an Internet search. They should also find out how people can protect themselves during tornadoes or hurricanes. Resources 21st Century Skills: Environmental literacy; Collaborate with others; Apply technology effectively; Be self-directed learners Teaching Tips: 1. Get pupils to think about clothes they would wear on a windy day. Brainstorm activities that can be carried out on a windy day. 2. Textbook page 35 Bring a pinwheel to class. Hold it near the window. Ask pupils to observe and infer if it is a windy day. Process Skill: Observing, Inferring 21st Century Skill: Use systems thinking Activity: Blow some bubbles and note the direction in which the bubbles float away. Ask pupils to infer the direction the wind is blowing. Process Skills: Observing, Inferring 21st Century Skill: Use systems thinking Rainy day Background: As tiny drops of water are formed by condensation of water vapour in the sky, clouds grow heavier. When clouds get thicker and heavier, they become darker. When a cloud gets too heavy, the water droplets fall to the ground as rain. Textbook page 36 Project Idea: Get pupils to contribute to a ‘rain bag’ or box containing a collection of resources for rainy weather that will stimulate discussion and exploration. For example, you could include a container to measure rainfall, an umbrella and a book on rainy weather. Use the resources to discuss rainy weather. 21st Century Skill: Collaborate with others Explain: More information about rain is shared Explain that: When tiny drops of water in the clouds join together and become heavier, the clouds become thick, dark, grey and hang low in the sky. The droplets then fall as rain. Page 8 of 15 © 2012 Alston Publishing House Pte Ltd BSCS 5E Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Notes Rainy weather is associated with low temperature and often, strong winds. A thunderstorm occurs when there is lightning and thunder as well. Teaching Tip: Discuss the possibility of flooding as a result of a heavy storm. Elaborate: Pupils extend their understanding by doing a project Project Idea: Ask pupils to do an Internet search on how they can protect themselves during heavy floods. Engage: Pupils share their experiences on a common situation Teaching Tip: Get pupils to describe a rainy scene. Then, get pupils to talk about their experiences with rainy weather. Discuss what people usually wear and do on a rainy day. Resources Textbook page 37 21st Century Skills: Make judgements and decisions; Communicate clearly; Apply technology effectively Process Skills: Observing, Communicating 21st Century Skill: Communicate clearly Background: A rainbow is formed by light shining on droplets of water in the atmosphere. The droplets of water cause light to bend and spread into its different component colours. Textbook page 38 Teaching Tip: Talk about the formation of a rainbow when the Sun shines through drops of rain. Get pupils to name the colours of a rainbow. Explore: Pupils go outdoors to explore the weather Activity: Encourage pupils to go outdoors in raincoats and boots, and explore during a rainy day with their parents as suggested in Build Your Skills! They can then have a first-hand experience with weather. Pupils should make use of their senses to find out more about the rain, e.g. listen to the sound rain makes when it hits the ground, smell the air, and feel the raindrops. Process Skills: Observing, Communicating Workbook page 16 Activity 2: Guess the Weather! Workbook page 17 Activity 3: My Weather Chart Consolidation Worksheet 2 Page 9 of 15 © 2012 Alston Publishing House Pte Ltd Lesson 2.3 BSCS 5E Explore: Pupils participate in a discussion about familiar situations Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Notes How Does the Weather Affect Plants and Animals? Teaching Tip: Get pupils to talk about how sunny or rainy weather affects us. Resources Textbook page 39 Ask pupils: How does sunny weather affect us? (Answer: We feel hot, perspire, feel thirsty more easily, wear cotton clothes that keep us cool, etc.) How does rainy weather affect us? (Answer: We feel cold, shiver, stay indoors, wear extra clothing, etc.) Explain that: Plants and animals behave differently towards the Sun, wind and rain. Sunlight Background: Sunlight is very important to plants as plants trap the Sun’s energy to make food during photosynthesis. Some plants such as grapevines and sunflowers grow well under plenty of sunlight. However, plants such as ferns and begonia grow better in the shade. Common Misconception: Pupils might think that the more sunlight is available to a plant, the better it will grow. This is not true. Sunlight affects plants in different ways. Although all plants need light to make food, some types of plants such as ferns and house plants need only a small amount of sunlight. Too much light and heat from the Sun can kill them instead. Background: The Sun also provides heat that helps animals stay warm. Some animals, especially reptiles such as snakes, tortoises, monitor lizards and crocodiles, need to absorb heat from the Sun to stay active. Otherwise, they would lack energy and become sluggish. Textbook page 40 Cold-blooded animals cannot maintain a constant body temperature, unlike warm-blooded animals. Their body temperature changes with their surroundings. A cold-blooded animal's level of activity depends upon the temperature of its surroundings. A reptile, for example, will increase its body temperature before hunting and is better able to escape predators when it is warm. Cold-blooded animals also need to be warm and active to find a mate and reproduce. Snakes, lizards, toads, frogs, salamanders and most turtles will hibernate during cold winters. Teaching Tip: Show pictures of animals living in hot and cold climates, such as the fennec fox (that lives in the desert) versus the Arctic fox (that lives in snow). Get pupils to study and compare these animals. Process Skills: Observing, Comparing Page 10 of 15 © 2012 Alston Publishing House Pte Ltd BSCS 5E Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Notes Wind Activity: Create a model of a wind-dispersed seed. You may use the suggested website as reference. Go outside where it is windy or use a fan in class to show how such a seed travels with wind. Try to spin it before letting go. Resources URL 2.4 Process Skills: Observing, Analysing 21st Century Skill: Use systems thinking Teaching Tip: Use the videos to show how seeds are dispersed by wind. Explain: The concept is explained further URLs 2.5, 2.6 Explain that: Some plants depend on wind to carry their seeds to places where they can grow into new plants. Examples of seeds with hair-like parachutes: dandelions, cattails, milkweed. Examples of seeds with helicopter wings: sycamore and maple seeds. Wind may also give away the location of a hunting animal and cause the hunted animals to flee from it. When birds fly in the direction of the wind, they use less energy and can fly faster. However, if the wind is in the opposite direction from their flight, it slows them down. Rain Background: Rain provides water for both plants and animals. In periods of drought, during which there is no rain, many animals and plants may die. Some plants, such as mosses and ferns, need more moisture than other plants to grow. Textbook page 41 The rain fills ponds, lakes, rivers and waterholes from which animals drink. When it rains, most animals respond by hiding under shelter to stay dry. Water wets animals’ body coverings which will then not be able to keep them warm or help them in their flight. Elaborate: Pupils build up existing knowledge with new ideas Teaching Tip: Get pupils to recall what they have learnt in Grade 1 Chapter 4: Animals, and Grade 1 Chapter 5: Plants, that living things need water to stay alive. Tell pupils that rain fills up ponds, rivers and waterholes to provide water for animals to drink. It also seeps into the ground and is absorbed by the roots of plants. 21st Century Skill: Use systems thinking Engage: Pupils learn more about the concept through stories Activity: Share the following stories with pupils. 1. Where Do They Go When It Rains? by Gerda Muller Book description: Stef takes the twins out for a walk to the pond. On their way they pass through fields full of Page 11 of 15 © 2012 Alston Publishing House Pte Ltd BSCS 5E Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Notes flowers, grasshoppers and bees. They stop at a farm, where they feed the hens, pigs and ponies. But when they reach the pond, the clouds turn grey and it starts to rain. The twins love splashing about in the rain. But where do all the animals go when it rains? 2. Resources Where Does the Butterfly Go When It Rains? by May Garelick Book description: May Garelick's rhythmic text explores what happens to various animals when it rains. Where do they go? What do they do? Background: Earthworms need to keep their skin moist so that gaseous exchange can take place between their body and the surroundings. Most of the time, the conditions above the ground are too hot and dry and they will dry out and die because they cannot breathe through their skin. After the rain, when the air is moist, they can come out and look for a mate. Textbook page 42 Ask pupils: Which animals do you see when it is raining or right after the rain? (Answer: Earthworms, snails, frogs etc. Accept all possible answers.) Explain: Phenomenon is explained to pupils Explain that: Water birds, such as ducks, are able to stay waterproof in the rain because their feathers are coated with a layer of oil which repels water. Animals which need to keep their skin moist such as earthworms, snails and frogs also like a cool and moist atmosphere. Workbook page 18 Activity 4: I Like It Sunny! Activity: Take pupils out for snail or earthworm hunting after the rain. Consolidation Worksheet 3 Workbook page 19 Activity 5: A Rainy Day Teaching Strategy: Hands-on learning outside the classroom Internet links for Lesson 2.3 URL 2.4: Wind Power — Create a model of a wind-dispersed seed http://www.nwf.org/~/media/PDFs/Be%20Out%20There/Schoolyard%20Habitats/windpower.ashx URL 2.5: Seed dispersal http://www.mbgnet.net/bioplants/seed.html URL 2.6: Dandelion seed dispersal http://scienceprojectideasforkids.com/2010/dandelion-seed-dispersal/ Page 12 of 15 © 2012 Alston Publishing House Pte Ltd Lesson 2.4 BSCS 5E Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Notes How Can We Predict the Weather? Background: These are common weather instruments used: A maximum-minimum thermometer is used to measure the highest and lowest outdoor temperatures in degrees Fahrenheit and degrees Celsius. It gives three readings: the current temperature, the highest temperature reached since it was last reset, and the lowest temperature reached since it was last reset. Barometers measure atmospheric pressure in millibars. Under most conditions, high and rising pressure indicates sunny weather, while low and falling pressure indicates approaching rain. Anemometers measure the direction and speed of wind in miles per hour. A common type of anemometer has three cups fixed to a shaft. As the wind blows, the cups spin around. The actual speed of the wind shows up on a dial. A rain gauge measures the amount of rainfall. The standard rain gauge consists of a long, narrow cylinder that can measure rainfall up to 8 inches. A wind vane, also called a weather vane, measures the direction of the wind at any given point in time. A weighted arrow spins around a fixed shaft and points North, South, East or West to indicate the direction the wind is coming from. Engage: A real-life example is presented to start the topic Teaching Tip: Play a short clip of a weather forecast from the Internet or radio, or read the weather forecast from the local newspaper. Explain: The idea is explained further to pupils Explain that: Weather forecasts tell us what kind of weather to expect for the next few days. Scientists use special tools to gather data, besides observing clouds, so that they can better predict the weather. The data that scientists collect include air temperature, rainfall, wind speed and wind direction. Explore: Pupils learn by watching a video Resources Textbook page 43 Ask pupils: How do weather forecasters predict the weather? (Answer: They use instruments to collect data to predict what the weather will be like.) Background: A weather satellite is primarily used to monitor the weather and climate of Earth. It collects environmental information such as cloud formations, hurricanes, effects of pollution, sand and dust storms, ocean currents, energy flows, etc. Textbook page 44 Teaching Tip: Show pupils the suggested video to learn how scientists predict weather using clouds. URL 2.7 Page 13 of 15 © 2012 Alston Publishing House Pte Ltd BSCS 5E Elaborate: Pupils find out more by doing projects Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Notes Project Ideas: 1. Pupils can do research on the coldest or hottest places on Earth. Alternatively, they can find out which place has the most rain or least rain every year. 2. Make an interactive weather bulletin board for a five-day week from Monday to Friday. A thermometer can be drawn on the bulletin board for each day whereby pupils can read the temperature at, say, 2 pm every day, and colour in the thread showing the reading. They can also draw symbols on what the weather was like. A rain gauge can be set up outside to collect rainfall and a windsock set up to find out the direction of the wind. 3. Make a scrapbook with fun weather facts. 21st Century Skills: Communicate clearly; Collaborate with others; Be self-directed learners; Manage projects Background: Meteorologists provide weather forecasts and warnings. Forecasts are used by governments and industries to protect life and property. Farmers need information on the weather to help them plan for the planting and harvesting of their crops. Airlines need to know about local weather conditions in order to schedule flights. Individuals need weather information to plan a wide range of daily activities. Ask pupils: Who will need to know weather information? (Answer: Farmers, sailors, airlines, individuals. Accept all possible answers.) Evaluate: Pupils apply what they have learnt in an activity Activity: Get pupils into groups to gather some weather information for the next few days and do a skit on weather forecasting. Encourage the use of props. Resources Workbook pages 21—22 Activity 6: Let’s Collect Rain! Workbook pages 23—25 Activity 7: Make Your Own Windsock! Textbook page 45 Workbook pages 27—28 Activity 8: I’m a Weather Detective! Consolidation Worksheet 4 Process Skills: Analysing, Predicting 21st Century Skills: Communicate clearly; Be self-directed learners; Think creatively Wrap up the chapter with the following: Talk It Out Teaching Tip: Read the new words out loud and have pupils repeat each word after you so they can learn to pronounce the words correctly. Then, have pupils pair up to test each other on the meaning of the words. Map It Out Teaching Tip: Go through the concept with pupils after finishing the chapter. Trace the path of the mind map by reading out loud. You may wish to draw the map as you speak. The weather can be sunny, cloudy, rainy or windy. Textbook page 46 Page 14 of 15 © 2012 Alston Publishing House Pte Ltd BSCS 5E Science SMART Teacher’s Guide Grade 2 Chapter 2 Lesson Plans Lesson Notes The weather can be predicted in a weather forecast by: Observing clouds Collecting information on wind direction, wind speed, temperature and rainfall. Science @ Work Teaching Tips: 1. Share with pupils what acid rain is and raise awareness on alternative energy as outlined in the passage. 2. To boost pupils’ reading and speaking confidence, have pupils take turns reading the passage, e.g. each pupil could read one paragraph. Encourage pupils to read with enthusiasm and emotion. Resources URL 2.8 Fun and Games Internet links for Lesson 2.4 URL 2.7: A video by NASA on how scientists predict the weather (corresponds with Internet Link 2.1 in Textbook) http://www.youtube.com/watch?v=dqpFU5SRPgY URL 2.8: What is Acid Rain? http://www.epa.gov/acidrain/education/site_students/whatisacid.html Page 15 of 15