Questions:
1. What are the different organisms involve in the cycling of materials
2. Why are these cycles important in the ecosystem?

B. Fact or Bluff! Directions: Refer to the diagrams above to identify whether the given statement is a FACT or a BLUFF. Fact if it is correct and Bluff if not.

1. Human can return the water in the environment through sweating.
2. Carbon dioxide is important to plants to make their own food.
3. The sun is the energy source that drives the water cycle.
4. There is no way that animals can give off carbon dioxide.
5. Animals get the nitrogen they need by eating plants or other animals that contain nitrogen.
6. Nitrogen is returned to the atmosphere by photosynthesis.
7. Decomposers break down the remains of plants and other speciesand release nitrogen in the form of ammonium ions.
8. Plants help in maintaining the oxygen level in the environment.
9. Carbon moves from plants and animals to soils.
10. The majority of nitrogen is found in ocean.​