| Think About It! |
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7 | (1) |
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How did scientists develop a theory about gravity? |
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11 | (12) |
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2 Extreme Gravity on Earth |
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Does gravity's force ever change on our planet? |
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23 | (4) |
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3 Putting Theories Together |
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What did Albert Einstein do to our understanding of gravity? |
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27 | (3) |
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Living in Zero Gravity: What happens to astronauts in space? |
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30 | (3) |
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How do astronauts learn how to deal with gravity? |
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33 | (7) |
| Activity 1 How Does Gravity Work? |
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40 | (2) |
| Activity 2 How Much Do You Weigh? |
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42 | (2) |
| True Statistics |
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44 | (1) |
| Resources |
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45 | (1) |
| Important Words |
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46 | (1) |
| Index |
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47 | (1) |
| About the Author |
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48 | |
| Think About It! |
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7 | (1) |
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What characteristics define matter? |
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11 | (4) |
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2 Building the Universe: Atoms |
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How are atoms structured? |
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15 | (5) |
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The Periodic Table: What is the periodic table? |
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20 | (3) |
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3 Molecules, Elements, and Compounds |
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How do elements interact? |
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23 | (4) |
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How do bonds form between atoms? |
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27 | (6) |
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What happens to substances as they change from one state to another? |
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33 | (7) |
| Activity 1 A Simple, Tasty Phase Change |
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40 | (2) |
| Activity 2 The Magic Inflating Balloon |
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42 | (2) |
| True Statistics |
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44 | (1) |
| Resources |
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45 | (1) |
| Important Words |
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46 | (1) |
| Index |
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47 | (1) |
| About the Author |
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48 | |
| Think About It! |
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7 | (4) |
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What causes a sound to form? |
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11 | (8) |
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How are the qualities of a sound measured? |
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19 | (7) |
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How We Hear: What happens when a sound wave reaches your ear? |
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26 | (3) |
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How do people use sound in everyday life? |
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29 | (6) |
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How are sound recordings made? |
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35 | (5) |
| Activity 1 Make Your Own Record Player |
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40 | (2) |
| Activity 2 Sound in Motion |
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42 | (2) |
| True Statistics |
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44 | (1) |
| Resources |
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45 | (1) |
| Important Words |
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46 | (1) |
| Index |
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47 | (1) |
| About the Author |
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48 | |
| Think About It! |
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6 | (1) |
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What are the two basic types of energy? |
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11 | (4) |
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Where on Earth is energy stored? |
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15 | (8) |
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How does life on Earth use energy? |
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23 | (7) |
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Alternative Energy: What are some safe, Earth-friendly energy sources? |
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30 | (3) |
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How do we use energy in our daily lives? |
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33 | (7) |
| Activity 1 Sticky Balloon! |
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40 | (2) |
| Activity 2 Sensing Sound! |
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42 | (2) |
| True Statistics |
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44 | (1) |
| Resources |
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45 | (1) |
| Important Words |
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46 | (1) |
| Index |
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47 | (1) |
| About the Author |
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48 | |
| Think About It! |
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7 | (1) |
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What is electricity, and how do we use it? |
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11 | (8) |
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How does electricity power devices? |
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19 | (5) |
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Current Showdown: Who invented the type of current that is now used to send electricity through power lines? |
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24 | (11) |
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What causes magnets to push and pull on objects? |
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27 | (8) |
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How are magnets important in our everyday lives? |
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35 | (5) |
| Activity 1 Shocking Static! |
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40 | (2) |
| Activity 2 Floating Magnets! |
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42 | (2) |
| True Statistics |
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44 | (1) |
| Resources |
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45 | (1) |
| Important Words |
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46 | (1) |
| Index |
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47 | (1) |
| About the Author |
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48 | |
| Think About It! |
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7 | (4) |
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What is light? Where does it come from, and what does it do? |
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11 | (6) |
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How does light move from its source to us? |
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17 | (8) |
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How does light affect what we see? |
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25 | (5) |
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Living Lights: What are bioluminescent animals? |
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30 | (3) |
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Are there light waves beyond what we can see? |
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33 | (4) |
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What are some natural occurrences that produce light shows? |
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37 | (3) |
| Activity 1 Bouncing Light |
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40 | (2) |
| Activity 2 Waterfall of Light |
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42 | (2) |
| True Statistics |
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44 | (1) |
| Resources |
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45 | (1) |
| Important Words |
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46 | (1) |
| Index |
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47 | (1) |
| About the Author |
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48 | |
