1. In order for a gas to be a "greenhouse gas" it must
2. The normal process occurring on Earth that warms its surface and the lower atmosphere is called
3. Which statement about ozone and the ozone layer is true?
Ozone is found in a band of almost pure ozone several kilometers thick encircling the Earth.
The ozone in the ozone layer absorbs UV light between 200 and 300 nm. Ozone is a compound with the chemical formula CO2.
In the Earth's atmosphere, ozone exists only in the ozone layer.
4. Which one of the following reactions is an example of nitrogen fixation?
N2O5(g) ? NO3(g) + NO2(g)
N2(g) + O2(g) ? 2NO(g)
3NO2(g) + H2O(l) ? 2HNO3(aq) + NO(g)
2NO(g) + O2(g) ? 2NO2(g)