Term
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Definition
| Resources, such as soils and forests, which can be replaced by Earth’s natural processes. P59 |
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Term
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Definition
| A system of growing different crops on the same land over a period of years. P59 |
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Term
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Definition
| Horizontal ridges built into the slopes of seep hillsides to prevent soil loss and aid farming. P60 |
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Term
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Definition
| the long-term process of losing soil fertility and plant life. P60 |
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Term
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Definition
| The destruction or loss of forest areas. P61 |
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Term
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Definition
| The planting of trees in places where forests have been cut down. P61 |
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Term
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Definition
| Relatively dry with small amounts of rain. P62 |
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Term
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Definition
| Artificial channels for carrying water. P62 |
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Term
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Definition
| Underground, water-bearing layers of rock, sand, or gravel. P62 |
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Term
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Definition
| The process in which the salt is taken out of seawater. P63 |
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Term
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Definition
| A type of polluted rain, produced when pollution from smokestacks combines with water vapor. P64 |
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Term
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Definition
| A slow increase in Earth’s average temperature. P64 |
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Term
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Definition
| Resources, such as coal and oil, that cannot be replaced by Earth’s natural processes or that are replaced slowly. P65 |
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Term
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Definition
| Inorganic substances that make up Earth’s crust, occur naturally, are solids kin crystalline form, and have a definite chemical composition. P65 |
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Term
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Definition
| Shiny minerals, like gold and iron, that can conduct heat and electricity. P65 |
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Term
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Definition
| Minerals that lack the characteristics of metal. P66 |
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Term
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Definition
| Nonrenewable resources formed from the remains of ancient plants and animals. P68 |
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Term
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Definition
| An oily liquid that can be refined into gasoline and other fuels and oils. P65 |
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Term
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Definition
| Factories where crude oil is processed. P68 |
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Term
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Definition
| A renewable energy resource produced from dams that harness the energy of falling water to power generators. P70 |
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Term
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Definition
| A renewable energy resource produced from the heat of Earth’s interior. P70 |
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Term
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Definition
| A renewable energy resource produced from the Sun’s heat and light. P71 |
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