| Question | Answer |
|---|---|
| What is the most signifaicant reason that species are becoming endangered? | Loss of habitat. A habitat provides all the needs for the organism, and if the habitat is destroyed, the animal could die, and become endangered. |
| One of the most important functions of nitrogen in an ecosystem is its ability to make _______, which make hop a large part of every cell. | protein |
| What is first step in the nitrogen cycle? | Lightning fixes nitrogen in the air into nitrogen compounds |
| What is the third step in the nitrogen cycle? | Plants absorb nitrogen compounds from the soil and make amino acids |
| What is the fourth step in the nitrogen cycle? | Animals eat the plants |
| What is the last step in the nitrogen cycle? | Decomposers break down nitrogen-containing compounds in dead plants and animals, and release nitrogen gas into the air. |
| what is the first step in the water cycle? | Evaporation from oceans, lakes, and streams |
| What is the second step in the water cycle? | Condensation |
| What is the third step in the water cycle? | Precipitation |
| What is the fourth step in the water cycle? | surface runoff |
| what is the last step in the water cycle? | Evaporation from plants |
| What is the second step in the nitrogen cycle? | Rain carries nitrogen compounds from the air to the ground |
| What is the first step in the carbon cycle? | Carbon enters the atmosphere as carbon dioxide from respiration (breathing) and combustion (burning) |
| What is the second step in the carbon cycle | Carbon dioxide is absorbed by producers to make carbohydrets in photosynthesis. These producers then put off oxygen. |
| What is the third step in the carbon cycle? | Animals feed on the plants.Thus passing the carbon compounds along the food chain. Most of the carbon these animals consume however is exhaled as carbon dioxide. This is through the process of respiration. The animals and plants then eventullay die. |
| What is the fourth step in the carbon cycle? | The dead organisms are then eaten by decomposers in the ground.The carbon that was in the animals bodies then returns to the air as carbon dioxide. The decomposed plants and animals may then be available as fossil fuel in the future for combustion. |
