The planet turns on it's axis (causes daytime and nighttime), and while that happens, the Earth circles the Sun and this causes our year.
Answer:
A, B and D are the green house gases
ningbo is kinda friendly but you should know that they somtimes lit people ride bikes you should assk a person that lives in ningbo
The mantle is a like a plastic looking layer of the earth
<span>The
higher the altitude, the lower the atmospheric pressure. Lower pressure
in turn causes water to evaporate more quickly, and water actually
boils at a lower temperature. The percentage of oxygen in the air at two
miles (3.2 km.) is the same as at sea level (21%). However, the air
pressure is 30% lower at the higher altitude due to the fact that the
atmosphere is less dense--that is, the air molecules are farther apart.
The important effect of this decrease in pressure is this: in a given
volume of air, there are fewer molecules present. This is really just
another way of saying that the pressure is lower. This is called Boyle's
law.</span>
