Acceleration 94 Ancient 70 Ancient Life 70 Astronauts 132 Astronomers 131 Atmosphere 28, 123, 126 Attributes see Properties Attract 84 Bar Graphs see Graphs 'Bird's-eye' View 129, 130, 131 Bright 107 Calendar 133 Change of State 87 Circle 84 Clay 111, 113 Closer/Farther 133 Color 22, 107 Comets 129 Continental Drift 111 Cracks 113 Data 45 Day 128, 130, 133 Decrease 38 Deserts 113 Diagrams 133 Dim 107 Dinosaurs 111, 113, 67 Direction 25, 94, 98 Dirt 110 Dissolving 23, 87, 92 Dust 112 Earth 29, 128, 129, 130, 133 Earthquake(s) 111, 112, 113 Earthquake Faults 111 Earth Satellites 89, 94, 128, 129 Electric Attraction 84 Electric Repulsion 84 Electricity 82 Energy 15, 23, 82, 84, 97, 100, 102 Environment 79, 80, 110, 67, 69, 20 Erosion 111, 113 Evidence 45 Experiments 15, 36, 45 Extinct 70 Extinct Animals 113 Farther/Closer 133 Fast 98, 107 Features 27, 110 Float 81, 84 Forces 25, 94-97 Fossils 20, 27, 67, 70, 113 Fossils, Age of 113 Fossil Record 67 Fossil Remains 70, 111 Freezing 23, 87, 92 Friction 95, 98 Galaxy 128, 133 Gas(es) 79, 84, 112 Graphs 16, 36, 45 Gravity 95, 98 Guess 45 Heat 23, 128, 133 Heavens 129 Heavy (Heavier) 84 High 100, 107 Hills 113 Hot Gases 128 Increase 38 Intensity 102 Investigation 34-35 Invisible 92 Landforms 110 Larger/Smaller 133 Lava 112 Layered Rocks 111, 113 Light 26, 84, 100, 102, 107, 128, 133 Light Rays 102 Light Waves 102 Lightning 84 Liquids 79, 84, 87 Loudness 25, 100, 107 Low 100, 107 Magnetic compass 84 Magnetic forces 82 Magnetic poles 83-84 Magnetic properties 22-23, 84 Magnets 81, 83, 92 Matter 23, 82, 87, 89, 92 Measurement(s) 15, 35, 38, 79 Melting 23, 87, 92 Metric Measurement 15 Minerals 113 Mixing 87 Mixture 23, 92 Models 92, 133 Molten Rock 113 Month 130, 133 Moon 29, 128-130, 133 Motions 29, 84, 94-96, 130, 133 Mountains 113 Multicultural 44-45 Night 128, 130, 133 Observation 15, 35, 36, 38 Oceans 113 Opinion 45 Orbit 129, 133 Ores 113, 114 Oval 84 Phenomenon 23, 42, 45, 100 Physical Change 23, 87 Pitch 25, 100, 107 Plains 113 Planet 29, 128, 129, 133 Problem-solving 15 Properties 22, 25, 26, 79, 81, 82, 87, 102, 107 Pull 25, 84, 95, 98 Push 25, 84, 95, 98 Reflection 128, 130 Relative distance 133 Repel 84 Resources 110 Rises/Sets 129 River(s) 113 River Beds 113 Rock(s) 27, 110, 111, 113 Rock Cycle 111 Rock Layers 111, 113 Sand 111, 113 Satellites see Earth Satellites Science 15, 34, 41, 43 Scientific 33, 34, 41, 45 Scientist 33, 34, 35, 41, 43 Seasons 126 Seasonal Changes 28, 123, 126 Sets/Rises 129 Shadow 26, 102, 103, 107 Shining 128 Silt 113 Sink 81, 84 Size 133 Sky 128, 129, 133 Slow 20, 98, 107 Soil 110, 111, 113 Solar System 29, 128, 129 Solar Stills 92 Solid 79, 84, 87 Solution 92 Sound 25, 100, 107 Space 89, 128, 129, 130, 133 Space Satellites 129 Space Travel 132 Spacecraft 132 Sparks 84 Speed 25, 94, 98 Sphere 128, 133 Spin 129, 130, 133 Star 128, 129, 133 Star System 107, 128 States of Matter 22, 79, 84, 87, 92 Static Electricity 83, 84 Stones 110 Sun 29, 102, 107, 128, 129, 130, 133 Sunlight 82, 107 Surface 110 Technology 17, 24, 34, 43, 45, 89, 97 Telescope 132 Temperature 22, 97, 126 Thermometer 84, 123, 126 Universe 128, 129 Valley (ies) 110, 111, 113 Velocity 94 Vibrations 100, 107 Volcanic Lava 110 Volcanos 111, 112, 113 Waves 100, 107