_are particles of light.
a. Proton
b. Electrons
c. Photons
d. Neutrons

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 is a small water source like a stream or brook?

In order from largest to smallest what are earths five main oceans