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The Atmosphere

The Atmosphere. 01/03/12. The Atmosphere. The atmosphere is the layer of gases around the earth These gases are known as air. Air. Do the percentages of the gases ever change in air?. Is the atmosphere heavy?. Does the atmosphere have mass? Is it heavy?. Yes it does

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The Atmosphere

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  1. The Atmosphere 01/03/12

  2. The Atmosphere • The atmosphere is the layer of gases around the earth • These gases are known as air

  3. Air • Do the percentages of the gases ever change in air?

  4. Is the atmosphere heavy? • Does the atmosphere have mass? • Is it heavy? • Yes it does • Yes its weight is equal to a layer of water 10.36m thick surrounding the entire surface of the earth • So why doesn't it crush us?

  5. Filling balloons CO2 Oxygen • Which gas is more dense? Balloon Test tube Hydrogen peroxide 0.2g of Manganese dioxide Oxygen What is density? Density= Mass/Volume Hydrogen peroxide + Manganese dioxide

  6. Carbon dioxide balloon CO2 • Fill the test tube half way with vinegar • Put 3-4 teaspoons of baking soda into a balloon • Attach the balloon to the test tube and allow the balloon fill up with gas

  7. Oxygen Balloon Oxygen Balloon • Very carefully add two 5ml droppers of hydrogen peroxide to a test tube • Carefully weigh 0.2-0.3g of manganese dioxide and add it to a balloon • Attach the balloon to the test tube and allow the manganese dioxide to fall into the test tube leave for about 8-10mins to allow the balloon to fill Test tube Hydrogen peroxide 0.2g of Manganese dioxide Oxygen Hydrogen peroxide + Manganese dioxide • Manganese dioxide is a catalyst • A catalyst is a substance that speeds up a chemical reaction but does not get used up

  8. 35mm film canisters • Tidy away books and put mat down on desk • Fill the canister ¾ full with vinegar • Put a full spoon of baking soda onto a small square of j-cloth • Wrap the cloth into a parcel • Drop the parcel into the vinegar and very quickly put on the lid and turn canister upside down on table • Fill in section A of worksheet based on your observations

  9. Uses of carbon dioxide

  10. Animation of oxygen • Fill in section B of worksheet based on your observations

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