Mountain chains and river systems generally run North-South throughout the continent thus making for formidable barriers to East-West expansion.
<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>
Answer:
Wegener
Explanation:
Seems like an officer in the military i think.
D. Islands used for agriculture
Answer:
northern hemisphere
Explanation:
the eqautor is split between the earth and it is on the northern hemisphere
HOPE THIS HELPS
