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Weather and atmosphere

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Transcript

  • 1. Weather and the Atmosphere
  • 2. Important Facts
    • Earth’s atmosphere is the thin layer of gases that surrounds Earth.
    • Dry air is 78% nitrogen and 21% oxygen.
    • Factories produce less air pollution than motor vehicles.
  • 3. More Facts
    • Burning fossil fuels causes more pollution than soil erosion, dust storms, and forest fires together.
    • Nitrogen oxides react with other air pollutants in the presence of sunlight to form photochemical smog.
    • As altitude decreases, the density of the air increases .
  • 4. Facts Continued
    • As air pressure increases, the column of mercury in a barometer rises.
    • People live in the troposphere , or inner layer of the atmosphere.
    • The lowest temperatures in the atmosphere are found in the mesosphere.
  • 5. Let’s See If You Were Paying Attention
  • 6. The two most abundant gases in the atmosphere are
    • A. carbon dioxide and oxygen
    • B. carbon dioxide and nitrogen
    • C. nitrogen and oxygen
    • D. nitrogen and hydrogen
    • The Answer is
    • C
  • 7. When climbing a high mountain, you get out of breath easily because
    • A. the percentage of oxygen in the air decreases
    • B. the air is more dense
    • C. there is less oxygen in each cubic meter of air
    • D. air pressure is greater
    • The Answer is
    • C
  • 8. Instruments used to measure air pressure are called
    • A. Thermometers
    • B. Hygrometers
    • C. Hydrometers
    • D. Barometers
    • The Answer is
    • D
  • 9. The layer in our atmosphere in which weather occurs is the
    • A. troposphere
    • B. stratosphere
    • C. mesosphere
    • D. exosphere
    • The Answer is
    • A
  • 10. The atmosphere is
    • A. the layer in which weather occurs
    • B. the layer that contains the ozone layer
    • C. the layer of water in the oceans
    • D. the layer of gases that surrounds Earth
    • The Answer is
    • D
  • 11. The human activity that causes the most air pollution is the burning of _________
    • The Answer is
    • Fossil fuels
  • 12. Let’s Keep Learning!
  • 13. Earth’s atmosphere is important because…
    • it provides all the gases needed for living things
    • traps energy from the sun, which allows water to exist as a liquid
    • .
  • 14. Air in the atmosphere
    • has pressure because air has mass
    • contains particles
  • 15. From Earth to space, the main layers in our atmosphere are: Troposphere Stratosphere Mesosphere Thermosphere
  • 16. Acid Rain and the Ozone
    • Acid rain forms when water combines with sulfur oxides
    • The ozone layer in the stratosphere absorbs ultraviolet radiation
  • 17. Aneroid versus Mercury Barometer
    • An aneroid barometer is different from a mercury barometer in that it does not contain a liquid
  • 18. Let’s Test Our Knowledge
  • 19. Ozone is
    • A. a form of oxygen with three oxygen atoms in each molecule
    • B. a form of nitrogen with three oxygen atoms in each molecule
    • C. a form of oxygen with two oxygen atoms in each molecule
    • D. A form of nitrogen with two oxygen atoms in each molecule
    • The Answer is
    • A
  • 20. Water vapor is water in the form of
    • A. steam
    • B. crystals
    • C. a gas
    • D. droplets
    • The Answer is
    • C
  • 21. Smoke is dark in color because it consists mainly of
    • A. carbon dioxide
    • B. dust
    • C. water vapor
    • D. carbon
    • The Answer is
    • D
  • 22. Density can be determined using
    • A. density = mass/volume
    • B. density = volume/mass
    • C. density = mass * volume
    • D. density = mass + volume
    • The Answer is
    • A
  • 23. The condition of Earth’s atmosphere at a particular time and place is known as __________
    • The Answer is
    • weather
  • 24. The atmospheric gas called _______ forms clouds when it condenses.
    • The Answer is
    • Water vapor
  • 25. Acid rain can form when _______ in the air mixes with sulfur oxides to form sulfuric acid.
    • The Answer is
    • Water
  • 26. A(n) ________ barometer measures air pressure by using a metal chamber that is sensitive to pressure changes.
    • The Answer is
    • Aneroid
  • 27. Great Job!
  • 28. Resources
    • Clip Art (Microsoft PowerPoint 2003)
      • Images and effects
    • Science Explorer Weather and Climate (Prentice Hall science explorer). (2000). Upper Saddle River, New Jersey: Pearson Prentice Hall.

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