Gases in the atmosphereLOs:• Propose the composition of  Earth’s atmosphere.• Describe processes that lock away  carbon fr...
Gases in the atmosphere             Gas                  %           Oxygen        Carbon Dioxide           Nitrogen      ...
Gases in the atmosphere     Gas           %   Oxygen         21Carbon Dioxide   0.04   Nitrogen       78    Argon         ...
Gases in the atmosphereLOs:• Propose the composition of  Earth’s atmosphere.• Describe processes that lock away  carbon fr...
Sherlock Holmes and the  ‘Case of the Disappearing Carbon Dioxide’  Great ScottHolmes! Where                   Sedimentary...
Carbon SinksCarbon has been locked up in the Earth –Limestone / chalk (CaCO3)OceansRainforestsFossil FuelsLiving things
FAMILY FORTUNESWe asked 100 people where’s the carbon dioxide gone X      1         Limestone                             ...
Gases in the atmosphereLOs:• Propose the composition of  Earth’s atmosphere.• Describe processes that lock away  carbon fr...
Fractional Distillation     (Separating compounds by boiling point into fractions)Separating the gases in air:Make it very...
What use are the gases?Gas              Use                 Make ammoniaNitrogen         Inert – use in food packaging e.g...
Removing two villainsThe Earth may have originally stunkof babies nappies and cow farts….all because of ammonia and methan...
Try summary question              2 p.215Use p. 214 to help.Ex. p.218 Q3                      Extension                   ...
Self-Assessment2.a) fractional distillationb) Removed from liquified air as solids at -200Cc)i) Argonii) Oxygen + Argon ha...
5%                        Self-Assessment      25%                                                 25%              1     ...
Gases in the atmosphereLOs:• Propose the composition of  Earth’s atmosphere.• Describe processes that lock away  carbon fr...
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Gases in the atmosphere AQA C1 7.5

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Gases in the atmosphere AQA C1 7.5

  1. 1. Gases in the atmosphereLOs:• Propose the composition of Earth’s atmosphere.• Describe processes that lock away carbon from the air.• Explain how the gases in air can be separated.
  2. 2. Gases in the atmosphere Gas % Oxygen Carbon Dioxide Nitrogen Argon 0 9 . 72 0 8 4 1 . 0
  3. 3. Gases in the atmosphere Gas % Oxygen 21Carbon Dioxide 0.04 Nitrogen 78 Argon 0.9 1 Oxygen Carbon Dioxide 2 Nitrogen 3 Argon 4
  4. 4. Gases in the atmosphereLOs:• Propose the composition of Earth’s atmosphere.• Describe processes that lock away carbon from the air.• Explain how the gases in air can be separated.
  5. 5. Sherlock Holmes and the ‘Case of the Disappearing Carbon Dioxide’ Great ScottHolmes! Where Sedimentary, has all the my dearcarbon dioxide Watson. gone?
  6. 6. Carbon SinksCarbon has been locked up in the Earth –Limestone / chalk (CaCO3)OceansRainforestsFossil FuelsLiving things
  7. 7. FAMILY FORTUNESWe asked 100 people where’s the carbon dioxide gone X 1 Limestone X 38 2 Oceans 20 X 3 4 Rainforests Fossil fuels 16 13 X X 5 All living things 13 X
  8. 8. Gases in the atmosphereLOs:• Propose the composition of Earth’s atmosphere.• Describe processes that lock away carbon from the air.• Explain how the gases in air can be separated.
  9. 9. Fractional Distillation (Separating compounds by boiling point into fractions)Separating the gases in air:Make it very cold so liquefiesthen allow to slowly warm COLDERup and collect one gas.Gas Boiling pointNitrogen -196oCArgon -186oC WARMEROxygen -183oCCarbon Dioxide -78oC
  10. 10. What use are the gases?Gas Use Make ammoniaNitrogen Inert – use in food packaging e.g. crisps Use to cool things e.g. sperm samplesArgon Very inert – Use in light bulbsOxygen Hospitals – Help breathing WeldingCarbon Dioxide Stage shows – dry ice Use to cool things e.g. chemicals
  11. 11. Removing two villainsThe Earth may have originally stunkof babies nappies and cow farts….all because of ammonia and methane respectively.What happened to these?
  12. 12. Try summary question 2 p.215Use p. 214 to help.Ex. p.218 Q3 Extension p.218 Q3
  13. 13. Self-Assessment2.a) fractional distillationb) Removed from liquified air as solids at -200Cc)i) Argonii) Oxygen + Argon have similar b.p. so oftenproduce a mixture.
  14. 14. 5% Self-Assessment 25% 25% 1 1 Nitrogen 2 2 40% Oxygen 3 3 75% Methane 4 4 30% Ammoniaa) How did the atmosphere of the planet change?Amount of ammonia, methane and oxygen decreased, nitrogen increasedb) What might have caused the change in part a?Oxygen reacted with ammonia and methanec) Copy and complete the word equations to explain the shift oxygen wateri) Methane + ……………………….. Carbon dioxide + ………………………… oxygen waterii) Ammonia + ……………………….. Nitrogen + ……………………………
  15. 15. Gases in the atmosphereLOs:• Propose the composition of Earth’s atmosphere.• Describe processes that lock away carbon from the air.• Explain how the gases in air can be separated.

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