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VICEnvironmental ScienceQuick questions
Unit 4: How can climate change and energy use be managed?
Quick questions on Evidence and impacts of climate change (ice cores, proxy data, sea-level rise, feedback loops): VCE Environmental Science Unit 4
3short 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 are direct measurements?Show answer
Direct data are recorded with instruments in real time.
What is proxy data?Show answer
Proxy data are indirect records preserved in natural materials, used to reconstruct climate before instruments existed.
What are feedback loops?Show answer
Some impacts amplify warming through positive feedback loops. As ice melts, dark ocean or land is exposed, which absorbs more heat and melts more ice (the ice-albedo feedback). Warmer air holds more water vapour, a greenhouse gas, increasing warming. Thawing permafrost releases stored methane and CO2.
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