Edexcel C1 Topic 1

What is the percentage of nitrogen in today's atmosphere?

78%
How did oceans form in the Earth's early atmosphere?

Water vapour condensed
What produced gasses in the Earth's early atmosphere?

Volcanoes
Name 3 processes that increase levels of carbon dioxide.
- Burning fossil fuels
- Deforestation
- Livestock farming
- Volcanic Activity
What is the percentage of oxygen in today's atmosphere?

21%
Which was the most abundant gas in the Earth's early atmosphere?

Carbon dioxide
What is the word equation for iron reacting with oxygen?

Iron + Oxygen --> Iron Oxide
How did oxygen begin to be produced in the Earth's early atmosphere?

Plants carrying out photosynthesis
What is the most abundant gas in today's atmosphere?

Nitrogen
Name 2 processes that decrease levels of carbon dioxide.
- Photosynthesis
- Dissolving in oceans
How did levels of carbon dioxide begin to decrease in the Earth's early atmosphere?

Carbon dioxide dissolved in oceans

Author

HLHSscience

212845

Card Set

Edexcel C1 Topic 1

Description

The Earth's sea and atmosphere

Updated

2013-04-23T10:45:43Z

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