Which continents lie entirely in the northern hemisphere

These factors hinder environmental protection efforts in eastern europe.

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

One of the main reasons the united states occupied japan after world war ii was that