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TASBiologyQuick questions
Unit 1: Biodiversity and the Interconnectedness of Life
Quick questions on Cycling of Matter - TCE Biology (Tasmania)
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the carbon cycle?Show answer
Carbon is the backbone of all organic molecules and moves through several key processes:
What is the nitrogen cycle?Show answer
Nitrogen is needed for proteins and nucleic acids. Although the air is about seventy-eight percent nitrogen gas, most organisms cannot use it directly. Bacteria do most of the conversion work:
What is the water cycle?Show answer
Water moves through the environment by physical processes, with organisms playing a part:
What are human impact on cycles?Show answer
Human activity disturbs all three cycles. Burning fossil fuels and clearing forests add carbon dioxide to the air. Fertiliser use adds large amounts of fixed nitrogen, which can run off into waterways and cause algal blooms. Land clearing and dams alter the water cycle.
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