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4 Cards in this Set

  • Front
  • Back

List the main gases in the atmosphere ad the approximate proportions of the gases in the atmosphere.

Explain how carbon dioxide was removed from the Earth's atmosphere.

Dissolving in the oceans.
The production of sedimentary rocks such as limestone.
The production of fossil fuels from the remains of dead plants and animals.

Explain how air can be separated by fractional distillation.

Water vapour carbon dioxide freezes at –79ºC, and is removed
oxygen liquefies at –183ºC
nitrogen liquefies at –196ºC



State some uses of the products of the fractional distillation of air.

Explosives
Rocket fuel
Vitamin supplements
Aircraft
Oxygen therapy spray.