Ecosystems Questions
1. (a) State what ecologists mean by the following terms:
(i) habitat
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[1]
(ii) niche
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[1]
(iii) ecosystem.
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[1]
(b) Two more terms commonly used by ecologists are population and community. State the difference between a population and a community.
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[1]
[Total 4 marks]
2. The figure below represents the transfer of energy through a woodland ecosystem.
(a) Of the 800 000 kJ of energy which reaches the producers, only 10 000 kJ of energy is converted to growth in the producers.
(i) Calculate the percentage of the energy reaching the producers that is converted to growth in the producers. Show your working.
Answer = .................................. %
[2]
(ii) Explain what happens to the energy reaching the producers that is not converted to growth.
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[2]
(iii) Name one decomposer.
(i) habitat
................................................................................................................
[1]
(ii) niche
................................................................................................................
[1]
(iii) ecosystem.
................................................................................................................
................................................................................................................
[1]
(b) Two more terms commonly used by ecologists are population and community. State the difference between a population and a community.
.........................................................................................................................
.........................................................................................................................
[1]
[Total 4 marks]
2. The figure below represents the transfer of energy through a woodland ecosystem.
(a) Of the 800 000 kJ of energy which reaches the producers, only 10 000 kJ of energy is converted to growth in the producers.
(i) Calculate the percentage of the energy reaching the producers that is converted to growth in the producers. Show your working.
Answer = .................................. %
[2]
(ii) Explain what happens to the energy reaching the producers that is not converted to growth.
................................................................................................................
................................................................................................................
................................................................................................................
................................................................................................................
[2]
(iii) Name one decomposer.