6th grade Science test The Atmosphere

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  1. The percentage of oxygen in the atmosphere is approximately_______.
    21%
  2. A gas in the atmosphere that varies in different places and from time to time is____.
    water vapor
  3. Photochemical smog is caused by the action on chemicals of ______.
    sunlight
  4. Harmful substances in air, water, or soil are called _____.
    pollutants
  5. The amount of mass in a given volume of a substance is its _____.
    density
  6. As the density of air decreases, its pressure___.
    decreases
  7. Air pressure is often measured in ______.
    millibars
  8. The warmest layer of the atmosphere is the ______.
    thermosphere
  9. The layer of the atmosphere that reflects radio waves is the ______.
    thermosphere
  10. The stratosphere helps protect Earth from too much ultraviolet radiation because this layer of the atmosphere contains ______.
    ozone
  11. _______ is the most abundant gas in the atmosphere.
    Nitrogen
  12. Particles of carbon that enter the air when wood or coal are burned are called ______.
    soot
  13. One cause of acid rain is the burning of coal that contains a lot of ______.
    sulfur
  14. _______ is the force per unit area.
    Pressure
  15. The four main layers of the atmosphere are classified according ti changes in ______.
    temperature
  16. What is the condition of Earth's atmosphere at a particular time and place.
    Altitude
  17. What to fires need to burn?
    oxygen
  18. Has air quality improved over the past thirty years?
    yes
  19. Does air pressure decrease as altitude decreases?
    NO it increases
  20. Do auroras occur in the atmosphere?
    yes
  21. How is the density of air at the top of a mountain different that the density of air at sea level?
    The air at the top is denser that the air at sea level.
  22. Why would you have more trouble breathing at the top of a mountain than the density of air at sea level?
    There are fewer molecules in a square meter of air at the top of the mountain.
  23. Be able to describe how temperature in the atmosphere changes with altitude between the four main layers of the Earth's atmosphere.
    • Thermosphere:
    • Mesosphere:
    • Stratosphere:
    • Troposphere:

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Author:
CmuellerALC
ID:
318971
Filename:
6th grade Science test The Atmosphere
Updated:
2016-04-15 16:14:30
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6th grade test atmosphere
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6th grade Science test The Atmosphere
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6th grade Science test The Atmosphere
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