| Soil | ||
| #1 | Soil that is rich in humus has high | fertility |
| #2 | When earthworms add their wastes to the soil then die and decay in the soil they are contributing to the formation of | humus |
| #3 | These organisms break down and digest the remains of dead organisms | decomposers |
| #4 | Soil is a valuable resource because it | is important to all living things on land |
| #5 | What tem describes the management of soil to prevent its destruction? | soil conservation |
| Soil and Ecosystems | ||
| #1 | The practice of plowing fields along the curves of a slope is called | contour plowing |
| #2 | In which soil layer would you find loam that is rich in humus | A horizon |
| #3 | In conservation plowing why are dead weeds and stalks of the previous year's crop left in the ground? | to retain moisture and hold the soil in place |
| #4 | ponds and rivers are two types of this | freshwater ecosystems |
| #5 | The living parts of an ecosystem are called this | biotic factors |
| Ecosystems | ||
| #1 | What would be a biotic factor in the prairie ecosystem? | grass |
| #2 | The smallest unit of ecological organization is a single | organism |
| #3 | Gray wolves in a forest are an example of a | population |
| #4 | The largest population that an environment can support is called | carrying capacity |
| #5 | The nonliving parts of an ecosystem are called | abiotic factors |
| Biomes | ||
| #1 | The study of how things interact with each other and with their environment is called | ecology |
| #2 | All the different populations that live together in an area make up a(n) | community |
| #3 | Which biome receives less than 25 centimeters of rain per year? | desert |
| #4 | Coral reef, wetlands, and estuaries are all sub categories of what biome? | aquatic |
| #5 | Which biome is extremely cold and dry? | desert |
| Plants | ||
| #1 | What do producers release as a result of photosynthesis? | oxygen |
| #2 | What makes a leaf appear green? | chlorophyll |
| #3 | The ingredients of photosynthesis are | carbon dioxide and water |
| #4 | Photosynthesis in plants produces this | sugar and oxygen |
| #5 | to carry out photosynthesis, algae and plants use the biotic factors sunlight, carbon dioxide, and this | water |
| Final Question | |
| List each biome and the subcategories for each one | Aquatic, Desert, Forest, Grasslands, Tundra |