Which is often grouped together with southeast asia?
a. easter island
b. the philippines
c. indonesia
d. australia
can be more than one answer [apex]

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

The layers of earth are based on what two sets of characteristics?

Ozone in the upper atmosphere has been depleted by a. sulfur dioxide. b. chlorofluorocarbons. c. carbon dioxide. d. oxygen.