Because of large reserves that center around the persian gulf, the middle east often produces as much as two-thirds of the world’s supply of
a.
water
b.
cattle
c.
coal
d.
petroleum

What school are you from and what state are you from?

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite

[fw.02]sinkholes are often formed as a result of the actions of. a. heat on recharge b. pressure on aquifers c. acid in groundwater d. minerals in hot springs