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Nonliving, physical features of the environment. Includes Air, water, sunlight, soil, temperature, and climate. |
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| The air surrounding Earth. Made up of gases including nitrogen, oxygen, and carbon dioxide. |
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Features of the environment that are alive or were once alive. |
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| Model describing how Carbon molecules move between the living and nonliving world. |
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| Process in which producers make energy-rich nutrient molecules from chemicals. |
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| Average weather conditions of an area over time, including wind, temperature, and rainfall or other types of precipitationsuch as snow or sleet. |
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| Process that takes place when a gas changes to a liquid. |
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| Model that shows the amount of energy available at each feeding level in an ecosystem. |
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| Process that takes place when when a liquid changes to a gas. |
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| Model that shows the complex feeding relationships among organisms in a community. |
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| Model describing how nitrogen moves from the atmosphere to the soil, to living organisms, and then back to the atmosphere. |
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| Process in which some types of bacteria in the soil change nitrogen gas into a form of nitrogen that plants can use. |
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| Mixture of mineral and rock particles, the remains of dead organisms, air, and water that forms the topmost layer of Earth's crust and supports plant growth. |
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| Model describing how water moves from Earth's surface to the atmosphere and back to the surface again through evaportation, condensation, and precipitation. |
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