Show:
Vocabulary
Structure of the Earth
Earthquakes/Volcanoes
Plate Tectonics
Miscellaneous
100
The thinnest layer of the Earth
What is the crust
100

The layer of the Earth that covers its surface.

What is the crust.

100

Where do most volcanoes and earthquakes occur?

Plate Boundaries

100

This plate boundary occurs when plates move together.

Convergent Boundary

100

The Himalayan mountains are the result of a ___________________________ boundary.

Convergent

200
A number of rigid, but moving, pieces of Earth's surface
What is tectonic plates.
200

The thickest layer of the Earth.

What is the mantle.

200

Name one negative effect of volcanoes.

Poisonous gas

Destruction of cities/houses

Fires

200
The mid-ocean ridge is an example of a ____________________ boundary and ___________________ occurs here where new ocean floor is formed.
What is divergent boundary; sea-floor spreading
200

Hot air or liquid is less ________________ than cool air or liquid

Dense

300
The theory that all continents are fragments of Pangaea now drifting apart
What is the Continental Drift Theory
300

Plates float on top of the _______________________.

What is the asthenosphere

300

_________________ are a result from the build up of stress at a plate boundary.

Earthquakes

300

This type of plate boundary causes volcanoes to form.

Divergent Boundary (major cause)

Convergent Boundary (lesser extent)

300

What two things increase as you go further into the Earth?

Heat and Pressure

400

States that youngest rocks of ocean floor are at diverging boundaries, moving outward

What is seafloor spreading

400
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
What is the lithosphere
400

Name one positive effect of a volcano.

Creation of new islands or new rock for roads/buildings.

400
This is the mechanism (what causes) the plates to move
What is convection cycles in the mantle
400

Created the continental drift theory.

Alfred Wegener

500
Although the hottest layer of the Earth, this layer is solid metal
What is the inner core
500

This layer is made of molten (liquid) iron and nickel. It is also the second hottest layer.

Outer Core

500

What is the chain of over 300 active volcanoes around the Pacific Ocean known as?

The Ring of Fire

500

Continental Drift Theory was not accepted because it did not explain this

What is how the continents moved

500

Name a piece of evidence that supports continental drift.

Continents fit together like puzzle pieces.