Topic 10.4 Human effects of ecosystems Flashcards

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1
Q

State 3 human effects of ecosytems

A
  • climate change
  • depletion of biological resources
  • loss of biodiversity
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2
Q

Define the greenhouse gas effect

A

the process by which gases in the Earth’s atmosphere absorb and re-radiate the radiation from the sun, which had been reflected from the Earth’s surface, maintaining a temperature at the surface of the Earth that is warm enough for life to exist

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3
Q

Define sustainable

A

a resource that can be renewed/replaced and is available for future generations

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4
Q

Define global warming

A

the gradual increase in average temperature of the Earth’s surface (and oceans)

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5
Q

Describe and explain how global warming could effect plant species

A
describe:
-loss of existing species
-changes in distribution of plants
-changes in numbers/size/growth
explain:
-changes in rainfall patterns
-change in growing seasons 
-temperature too hot for some species
-increased carbon dioxide, more photosynthesis
-fall in pH of oceans and rivers
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6
Q

What factors would you take into account when deciding whether or not to use the conclusions made by scientists in their study?

A
  • if the methodology is valid (has it been properly designed to answer the questions being asked)
  • size of the study
  • if it was carried out with precise and accurate measurements
  • if it is reliable (can scientists repeat the methodology and obtain similar results)
  • knowing who carried out the test to see if it is biased
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