Zig Leszczynski

¡searchers, (r)Zig Leszczynski/Earth Scenes

¡searchers, (r)Zig Leszczynski/Earth Scenes

Labs/Activities

1 Feeding Habits of Planaria 25

O 2 Humus Farm 43

3 Studying a Land Ecosystem 76

O 4 The Greenhouse Effect 111

5 Oily Birds 137

Two-Page Labs

2 Where does the mass of a plant come from? 54-55

O 5 Biodiversity and the Health of a Plant Community . . 144-145

Rainforests

Design Your Own Labs

Applying Math

2 Temperature Changes 40

3 Temperature 80

5 Measuring Biodiversity 129

Applying Science

1 Do you have too many crickets? 15

4 What items are you recycling at home? 114

Astronomy: 9 Career: 41,79 Chemistry: 21,103 Earth Science: 42,51,74,130 Health: 106,136 History: 23

Social Studies: 97,140

Science^

Standardized Test Practice

1 Population Growth in

Fruit Flies 26-27

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