E

Resources

Venus

Resources, conservation of, 112-115; importance of, 92; natural, 94-100; nonrenewable, 95, 95; renewable, 94, 94-95, 95 Respiration, and oxygen, 37; and photosynthesis, 49 act Reusing, 112, 112 Rhinoceros, 6, 6, 131, 131 River(s), 77-78

Roundworm, as parasite, 22, 22

Salamanders, 71 Saltwater ecosystems, 80-83; coral reefs, 81, 81, 81 act; estuaries, 82-83, 83; oceans, 81; seashores, 82, 82 Sanitary landfills, 110, 110 Savannas, 75, 75 Science and History, You Can

Count on It, 28 Science and Language Arts,

Beauty Plagiarized, 118 Science and Society, Creating Wetlands to Purify Wastewater, 86; Rain Forest Troubles, 146 Science Online, birth and death rates, 16; coral reefs, 81; endangered species, 139; forests and wildfires, 65; global warming, 104; human population data, 10; life processes, 49; recycling, 114; reintroduction programs, 142; weather data, 41 Science Stats, Extreme Climates, 56

Science writer, 79 Scientific Methods, 25, 26-27, 43, 54-55, 76, 84-85, 111, 116-117, 137, 144-145; Analyze Your Data, 27, 85, 117, 145; Conclude and Apply, 25, 27, 43, 55, 76,85, 111, 117, 137, 145; Form a Hypothesis, 26; Make the Model, 117; Test the Model, 117; Test Your Hypothesis, 27

Scorpion, 74 Sea anemone, 22, 22 Sea otter, 132 Seashores, 82, 82 Sea stars, 82

Secondary succession, 65, 66, 67

Seed banks, 143

Seedling competition, 13 lab

Sheep, 17

Skin cancer, 136

Smog, 102, 102

Smoking, and indoor air pollution, 106 Snakes, as threatened species, 133, 133

Soil, 38; as abiotic factor in environment, 38, 38 lab, 43 act; building, 64-65, 65; determining makeup of, 38 lab; loss of, 93 lab, 109,109; nitrogen in, 47, 47; pollution of, 109-110, 110; topsoil, 93 lab, 109,109; in tropical rain forests, 72-73 Solar cells, 100, 100 Solar cooking, 116-117 lab Solar energy, 94, 99, 99-100, 100,

101, 116-117 lab Solar radiation, 105, 105 Solid waste, 109 South Pole, 56

Species, endangered, 131, 131, 132, 138, 138, 139, 139, 139 act; extinct, 130, 130; introduced, 134, 134; native, 134, 134; pioneer, 64, 65; threatened, 131, 131, 132, 132, 133, 133 Spiders, 23

Standardized Test Practice, 32-33,

60-61,90-91, 122-123 Steel, recycling, 114 Stream(s), 77, 77-78 Study Guide, 29, 57, 87, 119, 147 Succession, 64-67, 66; primary, 64-65, 65, 67; secondary, 65, 66, 67 Sulfur, 103 Sulfur dioxide, 103 Sun, energy from, 34; radiation from, 105, 105, 136 Surface water, 107, 107 Symbiosis, 22, 22

Taiga, 70, 70 Taxol, 128

Technology, nuclear power generation, 98, 98; turbine, 97, 97, 98

Temperate deciduous forests, 68,

70, 70-71 Temperate rain forests, 71, 71 Temperature, as abiotic factor in environment, 39, 39-40, 40; of air, 104, 104; converting measures of, 80 act; and elevation, 40, 40, 40 act; extreme, 56, 56; and land, 68; of oceans, 80 Termites, 23, 23 Threatened species, 131, 131,

132, 133 TIME, Science and History, 28;

Science and Society, 86, 146 Topsoil, loss of, 93 lab, 109, 109 Tornadoes, 56 Tortoise, 132 Transpiration, 44 Tropical rain forests, 68, 72,

Demonstrating Habitat Loss, 133; Determining Soil Makeup, 38; Modeling Rain Forest Leaves, 72; Observing Mineral Mining Effects, 96; Observing Seedling Competition, 13 Tundra, 69, 69 Turbine, 97, 97, 98

Ultraviolet radiation, 105, 136 Uranium, 98

Use the Internet, Exploring Wetlands, 84-85

Venus, 9

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