Earth's Interior	Heat Transfer	Drifting Continents	Theory of Plate Tectonics	Sea-Floor Spreading
100	100	100	100	100
200	200	200	200	200
300	300	300	300	300
400	400	400	400	400
500	500	500	500	500
Final Question

Name the 3 MAIN layers.

Name the 3 MAIN layers.

crust, mantle, core

Oceanic crust is made if which type of rock?

basalt

Which layer is solid nickel?

inner core

What is the name for the upper part of the mantle?

asthenosphere

What creates Earth's magnetic field?

Currents in the outer core cause the inner core to spin a little faster than the rest of the planet.

Heat transfer through direct contact.

conduction

Heat transfer through empty space.

radiation

Heat transfer by the movement of heated fluid.

convection

Where does the mantle's heat come from?

The core.

What is cold?

The absence of heat

What is the name of the supercontinent?

Pangaea

Who proposed the theory of continental drift?

Alfred Wegener

In the mid 1900s what did scientists use to map the ocean floor?

sonar

What was the original use of sonar?

Tracking enemy subs during WWII

What three types of evidence did Wegener use for his theory?

fossil, landfor, climatic

What piece of evidence was Wegener missing from his continental drift theory?

What moved the continents

What causes the plates to move?

Convection currents in the mantle

What is a break in the Eart's crust called?

A fault.

Name the 3 types of plate boundaries.

divergent, convergent, transform

The San Andreas Fault in Californis is which type of boundary?

transform

Which ocean is getting smaller?

The Pacific

What is causing the Pacific Ocean to get smaller?

Subduction in the deep-ocean trenches

Which ocean is getting wider?

The Atlantic

What is causing the Atlantic Ocean to get wider?

Sea-floor spreading along the mis-ocean ridge

What is subduction?

One plate slides under another and goes back into the mantle

What does sonar stand for?

Sound navigation and ranging

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