Chapter 9 / 5 short lessons
Organisms and their environment
Read feeding relationships and pyramids, trace carbon and energy, and evaluate actions that reduce warming.
G3 Combined Biology / K327 / K328 / 2027 syllabus
What do you think?
In a food chain, does grass point towards a grasshopper, or does the grasshopper point towards the grass?
Lessons
0 of 5 marked as readReading food chains and food webs
Identify producers, consumers and decomposers and interpret feeding relationships.
About 5 minWhy less energy reaches the next level
Explain one-way energy flow and calculate the efficiency of transfer between trophic levels.
About 5 minPyramids of numbers and biomass
Construct and interpret pyramids while distinguishing counts from mass.
About 5 minFollowing carbon through an ecosystem
Trace carbon transfers and explain the roles of forests and oceans as carbon sinks.
About 5 minCarbon dioxide and global warming
Explain increased atmospheric carbon dioxide and connect mitigation actions to their mechanisms.
About 6 minWhat you will be able to do
- Interpret feeding relationships, energy transfers and pyramids.
- Distinguish carbon cycling from non-cyclical energy flow.
- Explain human contributions to warming and ways to reduce its effects.
Spaced review
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