AQA Chemistry 1

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Author:
HLHSscience
ID:
286362
Filename:
AQA Chemistry 1
Updated:
2014-10-20 07:29:11
Tags:
AQA CHEM
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Description:
Earth, Sea and Atmosphere
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  1. Where do volcanoes happen?
    On tectonic plate boundaries
  2. Why do people ignore scientists predictions of earthquakes?
    Cannot predict WHERE, WHEN or the STRENGTH of the earthquake
  3. What is the percentage of oxygen in the atmosphere today?
    21%
  4. How were oceans formed?
    Water vapour cooled and condensed
  5. What are the layers in the Earth?
    Crust, mantle and core
  6. What created gases in the Earths early atmosphere?
    Volcanoes
  7. How do earthquakes happen?
    Tectonic plates move suddenly, caused by convection currents in the mantle, caused by radioactive processes
  8. What is the percentage of nitrogen in today's atmosphere?
    78%
  9. What evidence suggests the continents used to be joined?
    • Fit like a jigsaw
    • Fossils found on both South America and Africa
  10. What

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