After an explosive volcanic eruption on an island, the surrounding sea is full of light-gray floating rock. what must it be?

How can health insurance increase life expectancy

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

What distinguishes monsoon asia from the remainder of asia? what are the consequent differences between the two?