True or False:
1.about 78% of the earth's atmosphere is made up of argon(Ar).
2.ozone keeps most of the sun's harmful radiation from reaching earth.
3.there is only one gas that causes the greenhouse effect.
4.the layers of the atmosphere are determined mainly by differences in temperature.
5.the oxygen that we breathe has three atoms of oxygen.
6.utraviolet radiation is form of invisible radiant energy that can cause sunburn that can be dangerous to people if absorbed in large quantities.
7.earth's atmosphere is composed of six layers.
8.mesosphere contains layer of ozone.
9.van allen belt is a radiation layer of ions that glows in different colors due to solar flares that hit the ionsphere.
10.solar radiation may be scattered back into space, absorbed by the atmosphere or absorbed by earth's surface. ​