Topic 4.4: Climate Change Flashcards Preview

HL Biology > Topic 4.4: Climate Change > Flashcards

Flashcards in Topic 4.4: Climate Change Deck (7):
1

What do greenhouse gases do?

Greenhouse gases absorb and emit long-wave (infrared) radiation, thereby trapping and holding heat within the atmosphere

2

Define greenhouse effect

The greenhouse effect is a natural process whereby the atmosphere behaves like a greenhouse to trap and retain heat

3

What is the first step of the greenhouse effect?

Incoming radiation from the sun is shorter wave radiation (ultraviolet radiation and the visible spectrum)

4

After Incoming radiation from the sun is shorter wave radiation (ultraviolet radiation and the visible spectrum) what is the next step of the greenhouse effect?

The surface of the Earth absorbs short wave radiation and re-emits it at a longer wavelength (i.e. infra-red / heat)

5

After The surface of the Earth absorbs short wave radiation and re-emits it at a longer wavelength (i.e. infra-red / heat) what is the last step of the greenhouse effect?

Greenhouse gases absorb and re-radiate this longer wave radiation and hence retain the heat within the atmosphere

6

Define precautionary principle

The precautionary principle states that when a human-induced activity raises a significant threat of harm to the environment or human health, then precautionary measures should be taken even if there is no scientific consensus regarding cause and effect

7

Define carbon footprint

A carbon footprint is defined as the total amount of greenhouse gases produced to directly and indirectly support human activity

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