Questions:
1.Describe the oxygen and carbon dioxide cycle.
2.Describe the water cycle.
3.Explain the parts played by evaporation and condensation in the water cycle.
4.Understand that the Sun the main source of energy for the water cycle.
5.State how human activities affect the water cycle.
Answers:
1. Carbon dioxide is used by trees and trees give out oxygen.
2. Humans take in oxygen and give out carbon dioxide.
3. Water evaporates then condenses and turns to ice. Then, it happens again.
4. Humans use alot of water everyday. Children should drink 2L of water everyday. Adults should drink 3L.
1.Describe the oxygen and carbon dioxide cycle.
2.Describe the water cycle.
3.Explain the parts played by evaporation and condensation in the water cycle.
4.Understand that the Sun the main source of energy for the water cycle.
5.State how human activities affect the water cycle.
Answers:
1. Carbon dioxide is used by trees and trees give out oxygen.
2. Humans take in oxygen and give out carbon dioxide.
3. Water evaporates then condenses and turns to ice. Then, it happens again.
4. Humans use alot of water everyday. Children should drink 2L of water everyday. Adults should drink 3L.