Edexcel C1 Topic 1

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Author:
HLHSscience
ID:
212845
Filename:
Edexcel C1 Topic 1
Updated:
2013-04-23 06:45:43
Tags:
Edexcel Chemistry1 Topic1
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Description:
The Earth's sea and atmosphere
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  1. What is the percentage of nitrogen in today's atmosphere?
    78%
  2. How did oceans form in the Earth's early atmosphere?
    Water vapour condensed
  3. What produced gasses in the Earth's early atmosphere?
    Volcanoes
  4. Name 3 processes that increase levels of carbon dioxide.
    • Burning fossil fuels
    • Deforestation
    • Livestock farming
    • Volcanic Activity
  5. What is the percentage of oxygen in today's atmosphere?
    21%
  6. Which was the most abundant gas in the Earth's early atmosphere?
    Carbon dioxide
  7. What is the word equation for iron reacting with oxygen?
    Iron + Oxygen --> Iron Oxide
  8. How did oxygen begin to be produced in the Earth's early atmosphere?
    Plants carrying out photosynthesis
  9. What is the most abundant gas in today's atmosphere?
    Nitrogen
  10. Name 2 processes that decrease levels of carbon dioxide.
    • Photosynthesis
    • Dissolving in oceans
  11. How did levels of carbon dioxide begin to decrease in the Earth's early atmosphere?
    Carbon dioxide dissolved in oceans

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