topic 9: ecosystems
Section 4: Ecology and the environment c) Cycles within ecosystems
4.2 explain how quadrats can be used to estimate the population size of an organism in twodifferent areas
4.3 explain how quadrats can be used to sample the distribution of organisms in their habitats.
4.4 explain the names given to different trophic levels to include producers, primary, secondary and tertiary consumers, and decomposers
4.5 understand the concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer
4.6 understand the transfer of substances and of energy along a food chain
4.7 explain why only about 10% of energy is transferred from one trophic level to the next.
4.8 describe the stages in the water cycle, including evaporation, transpiration, condensation and precipitation
4.9 describe the stages in the carbon cycle, including respiration, photosynthesis, decomposition and combustion
4.10 describe the stages in the nitrogen cycle, including the roles of nitrogen fixing bacteria, decomposers, nitrifying bacteria and denitrifying bacteria (specific names of bacteria are not required)
Key Terms:
4.2 explain how quadrats can be used to estimate the population size of an organism in twodifferent areas
4.3 explain how quadrats can be used to sample the distribution of organisms in their habitats.
4.4 explain the names given to different trophic levels to include producers, primary, secondary and tertiary consumers, and decomposers
4.5 understand the concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer
4.6 understand the transfer of substances and of energy along a food chain
4.7 explain why only about 10% of energy is transferred from one trophic level to the next.
4.8 describe the stages in the water cycle, including evaporation, transpiration, condensation and precipitation
4.9 describe the stages in the carbon cycle, including respiration, photosynthesis, decomposition and combustion
4.10 describe the stages in the nitrogen cycle, including the roles of nitrogen fixing bacteria, decomposers, nitrifying bacteria and denitrifying bacteria (specific names of bacteria are not required)
Key Terms:
|
cycles
carbon organic compound assimilation respiration carnivore primary consumer secondary consumer tertiary consumer quaternary consumer |
run-off
transpiration evaporation percolation ground water quadrate sample random bias food chain omnivore |
nitrogen-fixing
detritus decomposition nitrate water cycle top carnivore food web ecological pyramid biomass energy flow diagram |
nitrification
denitrifying bacteria denitrification ammonification mutualism habitat niche community population decomposer |
fossilisation
combustion recycling decay precipitation producers consumers decomposers ecosystem herbivore |
Classroom Assignments:
Cycling Nutrients worksheet
Organisms in the Environment (ppt)
Organisms in the Environment (study guide)
Deer Population activity
Raptor Population activity
Biodiversity practical
Random Sampling practical
Energy Flow Through An Ecosystem worksheet
Useful Links:
Read the article World Scientists Warning to Humanity
Use this interactive activity to help understand the Nitrogen Cycle
Check out this video clip on Bees
Review the article on Biodiversity.
BBC Bitesize Ecosystems
McGraw Hill Ecosystem and Biomes virtual lab
Science Joe Ecosystem animation
Check out this video clip on Coral Reef ecosystem
Check out the three Active Book animations on pg 155
Reference pgs 159-161 in your textbook and pg 57-59 in revision guide
Learning Outcomes:
Video Clips:
Cycling Nutrients worksheet
Organisms in the Environment (ppt)
Organisms in the Environment (study guide)
Deer Population activity
Raptor Population activity
Biodiversity practical
Random Sampling practical
Energy Flow Through An Ecosystem worksheet
Useful Links:
Read the article World Scientists Warning to Humanity
Use this interactive activity to help understand the Nitrogen Cycle
Check out this video clip on Bees
Review the article on Biodiversity.
BBC Bitesize Ecosystems
McGraw Hill Ecosystem and Biomes virtual lab
Science Joe Ecosystem animation
Check out this video clip on Coral Reef ecosystem
Check out the three Active Book animations on pg 155
Reference pgs 159-161 in your textbook and pg 57-59 in revision guide
Learning Outcomes:
Video Clips:
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