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4 functions of nature, such as purification of air and water, which support life and human economies
5 the rate at which producers use photosynthesis to produce and store chemical energy minus the rate at which they use some of this stored chemical energy through aerobic respiration
7 consumers that release nutrients from the dead bodies of plants and animals and return them to the soil, water, and air for reuse by producers
8 they feed on the wastes or dead bodies of other organisms
9 new discoveries and new ideas that overthrow a well-accepted scientific theory or law
10 a set of organisms interacting with one another and with their environment of nonliving matter and energy within a defined area or volume.
11 creates the nutrients they need from compounds and energy obtained from their environment
12 a possible and testable explanation of what they observe in nature or in the results of their experiments
13 A sequence of organisms, each of which serves as a source of food or energy for the next
14 consists of the parts of the earth’s air, water, and soil where life is found
1 organisms in most ecosystems form a complex network of interconnected food chains
2 the dry weight of all organic matter contained in its organisms.
3 anything obtained from the environment to meet our needs and wants.
4 exist in a fixed quantity, or stock, in the earth’s crust.
6 the annual market value of all goods and services produced by all firms and organizations, foreign and domestic, operating within a country.
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