Answer:
a and c
Explanation:
im guessing im sorry if im wrong
Answer:
Sudan
Explanation:
Many people think the answer is Egypt, but it is now Sudan.
Answer: It is the weight of air molecules pressing down on the earth.
Explanation: Without air, then their would be no living creatures roaming around on earth.
The answer is 2. because a geographer studies the effects it has on people, so hes studying the volcano because it has affected people.
If the rocks are layered on a fine scale
If the rocks are homogenous
If the crystals in the rock vary in size