What's important of earth crust in human being

1. Define half-life.

What two main factors do geographers use to determine a region's climate?

What direction do western boundary currents flow in the northern hemisphere?

Which convection model suggests that cold oceanic lithosphere sinks to great depths? Which convection model suggests that cold oceanic lithosphere sinks to great depths? slab pull ridge push whole mantle layer cake

The Rub al Khali (Empty Quarter) lies near the border between Saudi Arabia and:

The north pole is 100° north latitude

What two things make up an area's climate?

Apparent polar wander indicates that: a. the north magnetic pole wanders slowly around the entire Earth over million years timescales b. the continents have moved around the Earth's surface over million year time scales. c.

Is Egypt in the middle east? I know its in north africa, but its still considered middle east, right?

What factors lead people from the northeast of Brazil to move to the southeast?