Earth Science 3

What semi-solid substance is the Earth’s mantle compared to in the first plate tectonics video?

Thick peanut butter

What does Pangea mean?

“All the Earth”

The liquid mantle of the Earth is brought up to the surface to create seafloor spreading. What causes this to occur?

Convection

Who was the first person to propose the idea of the movement of the continents?

Alfred Wegener

What passage of Scripture tells us that all the land was once a large, collected landmass?

Genesis 1: 9-10

Continental crust

outermost layer of Earth’s atmosphere; composed of the Earth’s continents; formed near subduction zones at plate boundaries between continental and oceanic tectonic plates

Oceanic Crust

found under the Earth’s oceans and is formed at spreading centers on oceanic ridges, which occur along divergent plate boundaries

Convergent plates

come together (can form mountains or volcanoes)

Divergent plates

split apart

Transform plates

slide past each other

Seafloor spreading is the ____.

theory that new ocean crust is formed at divergent boundaries.

Layers of the Earth from the outside to the inside:

• Crust

• Mantle

• Outer core

• Inner core

What is the best explanation for movements of the plates?

Convection currents of the mantle.

The crust of the Earth sits on the ____.

asthenosphere

Mountains typically form at which boundary?

Convergent

What is the hard, rigid outer layer that floats on top of the asthenosphere?

Lithosphere