Question

1. visible light reaches earths surface while infrared light is trapped as heat. which characteristic of earths atmosphere causes this to happen?
2. without the greenhouse effect operating in our atmosphere ___.
3. the main gases responsible for the greenhouse effect include ___.
4. ice core samples taken over the past 60+ years show an increase in ___.
5. which of the answer choices best explains why the average temperature of the surface of earth has increased approximately 1°c in the past century?
6. the main human activity that releases greenhouse gases is ___.
7. which natural process removes carbon dioxide from the atmosphere?
8. which of the following natural events is not a source of carbon dioxide?
9. at what point in human history did global carbon levels start to rise?
10. which of the following have not been changed or altered due to climate change?
11. which of the following is not an effect of glacier and ice - cap melting?
12. ________ are considered to be the main natural carbon sinks on earth.
13. the ice at the north and south poles is important to maintaining a stable temperatures on earth because ___.
14. which choice best describes the effects of fossil fuels on climate change?

Explanation:

1. The greenhouse effect allows visible light to reach Earth's surface while trapping infrared light as heat.
2. The greenhouse effect keeps Earth warm; without it, Earth would be much colder.
3. The main greenhouse gases are carbon dioxide, methane, nitrous oxide, and water vapor.
4. Ice core samples show an increase in carbon dioxide over the past 60+ years.
5. Higher levels of carbon dioxide in the atmosphere trap more heat, increasing Earth's average temperature.
6. Burning fossil fuels is the main human activity that releases greenhouse gases.
7. Photosynthesis removes carbon dioxide from the atmosphere.
8. Ocean currents are not a source of carbon dioxide.
9. Global carbon levels started to rise during the Industrial Revolution.
10. Earthquake frequency is not changed by climate change.
11. An increase in fossil fuel emissions is not an effect of glacier and ice - cap melting.
12. Oceans are considered the main natural carbon sinks on Earth.
13. The ice at the poles reflects solar radiation, helping maintain stable temperatures.
14. Burning fossil fuels increases the levels of greenhouse gases that trap heat.

Answer:

1. B. the greenhouse effect (aqua green)
2. A. the Earth would be much colder (green)
3. C. carbon dioxide, methane, nitrous oxide, and water vapor (golden yellow)
4. B. carbon dioxide (blue)
5. C. higher levels of carbon dioxide in the atmosphere (purple)
6. C. burning fossil fuels (red)
7. A. photosynthesis (mahogany)
8. B. ocean currents (red orange)
9. A. the Industrial Revolution (light blue)
10. C. earthquake frequency (sky blue)
11. B. increase in fossil fuel emissions (orange)
12. A. oceans (yellow orange)
13. A. The ice reflects solar radiation (light brown)
14. C. Burning fossil fuels increases the levels of greenhouse gases that trap heat (yellow green)