∆abc rotates 90° clockwise about point p to form ∆a′b′c′.

How do convection currents form underwater mountains?

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

Lines of longitude are like stripes from the top of the globe down to the bottom virtually slicing the earth like an orange