7th Grade Science I-1 test the Atmosphere

  1. The envelope of gas that surrounds Earth.
  2. Elevation above sea level.
  3. Rain that contains more acid than normal.
    Acid Rain
  4. An instrument used to measure changes in air pressure.
  5. The amount of mass of a substance in a given volume.
  6. A form of oxygen that has three oxygen atoms in each molecule instead of the usual two.
  7. A brownish haze that is a mixture of ozone and other chemicals, formed when pollutants react with each other in the presence of sunlight.
    photochemical smog
  8. Harmful substances in air, water, or soil.
  9. The amount of force pushing on an area.
  10. A black powdery or flaky substance consisting largely of amorphous carbon, produced by the incomplete burning of organic matter.
  11. Water in the form of gas.
    Water vapor
  12. The condition of Earth's atmosphere at a particular time and place.
    water vapor
  13. Earth's atmosphere is 78% nitrogen, 21% Oxygen and the last 1% is a mixture of carbon dioxide, water vapor, and many other gases as well as particles of liquids and solids.
    Earth's atmosphere
  14. Air pressure decreases as altitude ________________.
  15. As air pressure decreases so does ____________.
  16. Air pressure is measured with a barometer.  Name the two kinds.
    • Mercury barometer - where air pushes down on on the mercury pushing it further up a small tube causing the pressure to rise.
    • Aneroid barometer - as air pressure increases the thin walls of the chamber are pushed in making the pressure rise.
  17. How many layers of atmosphere are there on Earth?
  18. The layer of atmosphere closest to the earth where it rains, snows, storms...most clouds are in this layer.  For every km you ascend the temp. drops a degree.  It can get as cold as -60 deg. C.
  19. The ozone layer absorbs ultraviolet radiation in this layer that is 12 - 50 km above the earth.  Temps start at -60 Deg C and get higher as you go up.
  20. Most meteoroids burn up in this layer producing meteor trails.  Temperatures approach -90 deg. C but gets warmer as it gets higher.
    Meso (or middle) sphere
  21. The outermost layer of  Earth's atmosphere.  The air here is thin and very hot - up to 1,800 deg. C
    It has 2 layers the ionosphere 80 - 400 km and the exosphere above 400 km.
  22. Thermo means ___________
  23. What unit of measurement is used to measure air pressure?
Card Set
7th Grade Science I-1 test the Atmosphere
Science atmosphere 7th grade test