Chapter 12 Quizizz and Kahoot ?s

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What is the mid

ocean ridge?- An undersea mountain chain where new ocean floor is produced; a divergent plate boundary

What type of crust exists in the world?

oceanic and continental

The permanent change in rocks

strain

What are P waves?

1st, fastest, & go through solids & liquids, They are push/pull waves

What are S waves?

2nd, slower, & go though solids; side-to-side waves;

What is a transform plate boundary?

Boundary between two plates that are sliding past each other

What is deformation?

Changes to the crust of the earth caused by plate tectonics.

What are the 2 types of crust that make up the earth?

Continental and oceanic

What occurs in the asthenosphere?

Convection Currents

What is the subduction zone?

Convergence of tectonic plates where one plate dives beneath another

What types of plate boundary can have a subduction zone?

Convergent

When two plates meet what controls what happens to the plates

Density of the plate

At what type of plate boundary does sea floor spreading occur?

Divergent

The area directly about the focus of the earth

Epicenter

This is the term for a break in a rock caused by motion of plates

Fault

This is where the actual plate movement/ slippage occurs (usually underground)

Focus

What gives us evidence that the continents were once together?

Fossils

The mid atlantic ridge is directly under which country?

Iceland

What does the Mercalli scale measure?

Intensity(damage done)

What does the richter scale measure?

Magnitude

What is the richter scale?

Measures the magnitude of the earthquake

Which scale uses observations to record the damage done by an earthquake?

Mercalli

Where are new rocks formed at divergent plate boundaries?

Mid-ocean ridge

Crustal deformation is caused by?

Movement of lithospheric plates

What are convection currents?

Occurs in the asthenosphere. Causes plates to move

What is Alfred Wegener famous for?

Pangea

What is a strain?

Permanent change in the shape of rocks

What happens when 2 continental plates meet at a convergent boundary

Plates collide and mountains are formed

What is a fossil?

Preserved remains that provide proof that the continents were once together

These are the most destructive waves...

R waves

What is created at a divergent plate boundary (like the mid ocean ridge)?

Rift Valley

Which type of wave can only move through solids

S Waves

What tool is needed to use the richter scale?

Seismograph

What are Love Waves?

Side to side motion surface waves

Africa used to fit into what other continents back in the pangea days?

South America

What is seafloor spreading?

Spreading of seafloor at divergent plate boundaries

An area where one plate slides under another is called?

Subduction Zone

Who was Wegner?

The man who investigated continental drift after finding fossils on opposite sides of oceans

What is a focus?

The point along a fault at which the first motion of an earthquake occurs

What is a epicenter?

The point on Earth's surface directly above an earthquake's focus

What is elastic rebound?

The snap back that causes earthquakes

What is density?

This determines how plates will interact when they collide.

The San Andreas fault is an example of what type of boundary

Transform

What are R waves?

Waves that cause the surface of the Earth to roll along with it

What is a divergent plate boundary?

Where two plates are moving apart, magma comes up to create new crust

What type of plate boundaries occur when two plates collide

convergent

What is the mercalli scale?

A scale that rates earthquakes according to their intensity and how much damage they cause at a particular place

What is a seismograph?

An instrument that records earthquake waves

What is a convergent plate boundary?

Area where earth's lithospheric plates are pushed together.

What is a fault?

A break in Earth's crust where masses of rock slip past each other


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