Cycles in Ecosystems - exam practice
Cycles in Ecosystems
Question 1 of 3
The water cycle shows the continuous movement of water within the Earth and atmosphere.
The image below shows the water cycle.
Which process forms part of both the carbon and water cycles?
Give two uses of water in plants.
State the process by which water is absorbed into plant roots.
Surface run-off water passes through soil and back into the lake.
Give one reason why surface run-off water is important to organisms living in the lake.
The diagram below shows part of the carbon cycle.
In the carbon cycle, which substance is absorbed by producers?
There is evidence that the concentration of carbon dioxide in the Earth’s atmosphere is increasing.
Which change could explain this?
Describe the roles of different living organisms in the carbon cycle.
The diagram below shows the carbon cycle.
Name the processes A to E.
A student was helping plant cabbages in the school allotment.
The student observed there were earthworms in the soil.
He also saw a mouse.
Explain how cabbages, earthworms and mice contribute to the carbon cycle.
Decomposers play an important role in the carbon cycle.
They release carbon dioxide.
Which process is responsible for this?
Describe how human activities are affecting the carbon cycle.