1. Home
  2. Flashcards
  3. Preview

Science - The Atmosphere

  1. List the gases that make up the atmosphere
    Nitrogen

    Oxygen

    Carbon Dioxide

    Water Vapour
  2. What percentage of nitrogen makes up the air?
    78%
  3. What percentage of oxygen makes up the air?
    21%
  4. List the five layers that makes up the Earth's atmosphere
    Troposphere

    Stratosphere

    Mesosphere

    Thermosphere

    Exosphere
  5. What is atmospheric pressure?
    This describes the pressure placed on the surface of the Earth by the gases in the atmosphere

    Atmospheric pressure has a big effect on weather
  6. What is a meteorologist?
    This is a scientist who studies the atmosphere
  7. What is a barometer?
    This is used to measure atmospheric pressure
  8. If there is low atmospheric pressure what will the weather be like?
    Rainy and windy
  9. If there is high atmospheric pressure what will the weather be like?
    Calm and dry weather
  10. What are isobars?
    These are lines on a weather chart that join areas of equal pressure

    The closer the isobars are together the windier and rainier it is
  11. What is a catalyst?
    This is a substance that speeds up a chemical reaction but is not used up in the reaction
  12. Describe how oxygen gas can be made
    Oxygen gas can be made by reacting hydrogen peroxide and manganese dioxide together

    Image Upload 1
  13. State the catalyst used in the production of oxygen
    Manganese Dioxide
  14. State the word equation for the making of oxygen
    Hydrogen Peroxide = Oxygen + Water
  15. State the chemical equation for the making of oxygen
    2H2O2 = 2H2O + O2
  16. Explain how a person could test for the presence of oxygen
    Put a blown out match into a test tube with oxygen and if it relights oxygen is present
  17. List the properties of oxygen
    It has no smell, colour or taste

    It dissolves in water

    It is needed for burning (it supports combustion)
  18. List the uses of oxygen
    Breathing

    Cutting and welding

    Steel Making
  19. Describe how carbon dioxide gas is made
    Carbon dioxide can be made in the lab by reacting hydrochloric acid and calcium carbonate (marble chips)

    Image Upload 2
  20. State the word equation for the making of carbon dioxide
    Calcium Carbonate + Hydrochloric Acid = Carbon Dioxide + Water + Calcium Carbonate
  21. State the chemical equation for the making of carbon dioxide
    CaCO3 + 2HCl = CO2 + H2O +CaCl2
  22. Why is carbon dioxide used in fire extinguishers?
    It does not support combustion (burning) and it is heavier than air
  23. Explain how a person would test for the presence of carbon dioxide
    1. Put limewater into a test tube of carbon dioxide and if it turns milky white carbon dioxide is present

    2. Put a lit match (candle) into a test tube of carbon dioxide and if it goes out carbon dioxide is present
  24. List the properties of carbon dioxide
    It has no smell, colour or taste

    It is heavier than air

    It puts out fires (it does not support combustion)
  25. List the uses of carbon dioxide
    Fire extinguishers

    Fizzy drinks

    Dry ice for special effects on stage

    Plants use carbon dioxide to make food during photosynthesis
Author
mshowley
ID
332284
Card Set
Science - The Atmosphere
Description
The Atmosphere
Updated

  1. Home
  2. Flashcards
  3. Preview