A fast-moving river causes greater erosion than a slow-moving river because

Which continents lie only in the northern hemisphere

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

About 140,000 japanese died in this japanese city when americans dropped an atomic bob at the end of world war ii