Vocabulary
Structure of the Earth
Continental Drift Theory
Plate Tectonics
Landforms
100
The thinnest layer of the Earth
What is the crust
100
There are ______________ main layers of the Earth.
What is four
100
Created the Continental Drift Theory
Who is Alfred Wegener
100
Earthquakes and Volcanoes are usually located in relation to these
What is a plate boundary
100

These large underwater mountain ranges are formed at divergent boundaries where two oceanic plates pull apart.

What is a mid-ocean ridge?

200

 These are rigid, but moving, pieces of Earth's surface

What is tectonic plates.

200
The thickest layer of the Earth
What is the mantle.
200

Evidence of matching animal fossils from two separate continents _____________________ and _____________________

What is Africa and South America

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

This type of landform forms when two continental plates collide, pushing land upward.

What are mountains?

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
The main piece of evidence Alfredo Wegener used to support his Continental Drift Theory.

What is fossils?

300
Name four of the major plates
What is any of the following North American plate, South American plate, Eurasian Plate, Indoaustralia plate, African plate, Antarctica plate
300

This deep, narrow landform is created at subduction zones where one oceanic plate sinks under another.

What is an ocean trench?

400
States that youngest rocks of ocean floor are at divergin 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

This supercontinent existed about 300 million years ago before breaking apart due to plate tectonics.

What is pangaea

400

This is the mechanism (what causes) the plates to move

What is convection current in the mantle

400

This valley-like landform is formed on land when two tectonic plates move away from each other.

What is a rift valley?

500

Although the hottest layer of the Earth, this layer is solid metal

What is the inner core

500
The Earth's crust is thinnest under the _____________________ and thickest under the _____________________.
What is thinnest under the ocean and thickest under the continents.
500

The Continental Drift Theory was not widely accepted at first because Wegener could not explain this key detail.

What is how the continents actually moved?

500
The 3 types of convergent boundary

What are oceanic-continental convergence, oceanic-oceanic convergence, and continental-continental convergence

500

This chain of volcanic islands forms when an oceanic plate sinks under another oceanic plate and melts into magma.

What is an volcanic island arc?

M
e
n
u