How can the absolute age of an igneous rock be determined?

What is the reason for the “scramble for africa”?

Alow pressure system is formed when an air mass cools over a cool surface and sinks. true or false

Anight-club bouncer, now a top official,put coke or pepsi in it; first three initial. combine all lakes; but i still have more,of all the places; i have the largest shore.what am i? ?