Earth Science: T4 Plate Tectonics

Vocab

100

________________ waves, are vibrations that travel through Earth carrying energy released by various processes, such as earthquakes, ocean storms and volcanic eruptions. 

Seismic waves 

200

Dense crust that is found a the bottom of the ocean is called what?

Oceanic crust

300

Long, zipper-like chains of undersea moutains

Mid-Ocean ridges

400

A wave or series of waves produced by an earthquake or landslide is called what? 

Tsunami

500

What is a break in the rock of Earth's crust or mantle called?

A fault 

Evidence of Plate Motions

100

Alfred Wegener developed the hypothesis called what?

Continental Drift 

200

We discussed three types of evidence that supported Continental Drift. They were climate, fossils and __________ _________________. 

Land features

300

True or false: There are 2 types of crust- Oceanic and Continuous

False- Oceanic and Continental 

400

________________ is the sinking movement of ocean floor back into the mantle. 

Subduction

500

Name the 3 types of faults

Normal, Reverse, and Strike-Slip

Plate Tectonics and Earth's Surface

100

What drives tectonic plate motion?

Convection

200

In this type of boundary the plates slip past each other.

Transform

300

At what type of plate boundary would you find a rift valley that is growing wider? 

Divergent boundary 

400

List the three types of boundaries. 

Convergent, divergent, and transform

500

Explain what the theory of plate tectonics had that the continental drift theory didn't. 

The theory of plate tectonics gave a how and a why to the theory of continental drift. 

Earthquakes and Tsunami Hazards

100

Seismic waves that are produced by an earthquake can be measured by this device. 

Seismograph

200

An earthquake's ____________ is a single number that geologists use to assign to an earthquake based on the earthquake's size. 

Magnitude

300

What is the "Ring of Fire"? 

Area around the Pacific Ocean where many of the world's earthquakes occur. There are many plate boundaries here. 

400

At this type of fault, walls of rock grind past each other in opposite directions. 

Strike-slip fault

500

Name the three types of stress  that can occur on Earth's crust.

Tension, compression, and shearing 

Volcanoes and Earth's Surface

100

This is a structure that forms out of Earth's crust when molten material, or magma, reaches Earth's surface. 

A volcano

200

A _______ ________ is an area where lava frequently erupts at the surface, independent of plate boundary processes. 

Hot spot

300

True or false: A cinder cone volcano is also known as a stratovolcano. 

False. A composite volcano is also known as a stratovolcano. 

400

A ___________ volcano is a volcano that is "sleeping", poses little threat, but could reawaken one day. 

Dormant

500

High-silica magma is ________________ and ______________. 

Thick and sticky