b7 - ecology

Question 1

stages of the carbon cycle

Answer 1

1. carbon is removed from the atmosphere by producers who use it in photosynthesis
2. carbon is returned into the atmosphere as carbon dioxide because of plant and animal respiration
3. when animals and plants die, decomposers return the carbon locked in their body back to the atmosphere via decay

Question 2

stages of the water cycle

Answer 2

1. water evaporates from the earth’s surface before rising up into the atmosphere
2. once in the atmosphere, the water vapour cools and condenses into either rain or snow and eventually returns to the earth’s surface
3. the rain or snow will either become surface runoff or will travel through the earth as groundwater
4. plants take up water through their roots