Inside Earth Part 1
To move around an axis inside the object (internal axis); the axis can be real or imaginary
What is rotation?
A break in the Earth's crust where masses of rock slip past one another
What is a fault?
A force that acts on rock to change its shape or volume
What is stress?
To move around an axis outside the object (external axis); the axis can be real or imaginary
What is revolution?
A type of fault where the hanging wall slides downward; caused by tension in the crust
What is a normal fault?
Stress that stretches rock so that it becomes thinner in the middle
What is tension?
The separation of Earth's interior materials based on density
What is differentiation?
A type of fault where the hanging wall slides upward; caused by compression in the crust
What is a reverse fault?
Stress that squeezes rock until it folds or breaks
What is compression?
Middle mantle; flows like hot asphalt; reason the crustal plates move (convection currents)
What is the asthenosphere?
A type of fault where rocks on either side moves in opposite, horizontal directions
What is a strike-slip fault?
Stress that moves rock in two opposite, horizontal directions
What is shearing?
Favored explanation for the formation of the solar system and our planet; rotating cloud of gas and dust, spins faster, 90% becomes Sun, 10 % becomes protoplanets, comets, meteors, and asteroids
What is protoplanet hypothesis?
What causes faults?
What is stress?