The northern portion of canada is covered by boreal forests which are characterized by

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 hebrews originally migrated from a. india b. egypt c. arabia d. mesopotamia

In the diagram below dab and dac are adjacent angles