Earth and Environmental Honors Unit 4a

Lithosphere Part 1

Crust, Mantle, Outer Core, Inner Core

What are the 4 layers of the Earth?

Oceanic Crust is thinner, denser, and made of basalt

What is the difference between oceanic crust and continental crust?

The Mantle

Which is the largest layer of the Earth?

Increases

How does temperature change as you move inside Earth?

Increases

How does pressure change as you move inside Earth?

Outer Core

What layer of the Earth is liquid?

Radioactive Materials Decaying

Why is the inside of the Earth incredibly hot?

Who was the scientist that came up with the idea of Continental Drift?

Alfred Wegener

Rocks, Fossils, Glaciers

What was the evidence that he used?

he idea that Earth's outer layer is made up of big pieces called plates. These plates move around on top of the softer layer below them, called the asthenosphere. When these plates move, they cause many changes on Earth's surface, like mountains, earthquakes, and volcanoes.

Describe the theory of Plate Tectonics (seafloor spreading).

Pangaea

What was the name of the last supercontinent?

Convection Currents

What causes the shifting of the plates?

When it reverses, new polarity begins.

How does magnetism help prove seafloor spreading?