Tectonic Plates and Earthquakes:

Plate Tectonics + Earthquakes

​Use Pg. 5 of your ESRT to answer the questions

Multiple Choice

According to the tectonic plates maps, New York State is presently located

• at a convergent plate boundary

• above a mantle hot spot

• above a mid-ocean ridge

• near the center of a large plate

Multiple Choice

Hot spots are located

• only at mid-ocean ridges

• only on the continental plates

• only on the oceanic plates

• on both continental and ocean plates

Multiple Choice

Sea-floor spreading is occurring at the boundary between the

• North American Plate and the Pacific Plate

• Nazca Plate and South American Plate

• Indian- Australian Plate and the Antarctic Plate

• Indian-Australian Plate and Eurasian Plate

Multiple Choice

Which feature is commonly formed at a boundary where oceanic crust converges with continental crust?

• a mid-ocean ridge

• an ocean trench

• a transform fault

• new oceanic crust

Multiple Choice

Oceanic crust is sliding beneath the Aleutian Islands in the North Pacific Ocean, forming the Aleutian Trench at a 

• convergent plate boundary between the Pacific Plate and the North American Plate 

• convergent plate boundary between the Pacific Plate and the Juan de Fuca Plate 

• divergent plate boundary between the Pacific Plate and the North American Plate 

• divergent plate boundary between the Pacific Plate and the Juan de Fuca Plate

Multiple Choice

Which surface feature was produced by crustal movements at a transform plate boundary?

• East African Rift

• Aleutian Trench

• Tasman Hot Spot

• San Andreas Fault

Multiple Choice

Compared to the density and composition of the oceanic crust, the continental crust is

• less dense and more mafic

• less dense and more felsic

• more dense and less mafic

• more dense and less felsic

Multiple Choice

The world map shows Earth's major tectonic plate boundaries. Letters A through D represent four surface locations.

Which location is on a major rift valley?

• A

• B

• C

• D

Multiple Choice

Which type of tectonic plate boundary is found between the South American Plate and the Scotia Plate?

• transform

• convergent

• divergent

• complex or uncertain

Multiple Choice

The diagram below shows the magnetic polarity preserved by minerals within the bedrock of the oceanic crust near the Mid-Atlantic Ridge. Letters A, B, C, and D represent locations in the ocean-floor bedrock.

The most recently formed bedrock is found at location

• A

• B

• C

• D

Earthquakes!

Dropdown

An ​

Select answer

is sudden ground movement. This movement is caused by the sudden release of the ​

Select answer

stored in ​

Select answer

. An earthquake happens when so much stress builds up in the rocks that the rocks break. An earthquake’s energy is transmitted by ​

Select answer

.

​Earthquake!

An earthquake is sudden ground movement. This movement is caused by the sudden release of the energy stored in rocks. An earthquake happens when so much stress builds up in the rocks that the rocks break. An earthquake’s energy is transmitted by seismic waves.

​Use the folowing website to answer the questions on the slides:

http://d3tt741pwxqwm0.cloudfront.net/WGBH/conv16/conv16-int-tectonic/index.html

Open Ended

What are the similarities between the plate boundaries and the earthquake locations?

Multiple Choice

Most earthquakes occur

• in the middle of the tectonic plates

• along the edges of the plate boundaries

• underneath the plates

• at the center of the earth.

Match

Match the following

• Epicenter

• Fault

• Plates

• Seismic waves

• Focus

The point at the surface of the Earth above the focus

A fracture in the rocks that make up the Earth’s crust

Massive rocks that make up the outer layer of the Earth’s surface

Waves that transmit the energy released by an earthquake

The point within the Earth where an earthquake rupture starts

• The point at the surface of the Earth above the focus

• A fracture in the rocks that make up the Earth’s crust

• Massive rocks that make up the outer layer of the Earth’s surface

• Waves that transmit the energy released by an earthquake

• The point within the Earth where an earthquake rupture starts

Labeling

Label on the image:

Drag labels to their correct position on the image

Seismic Waves

Focus

Epicenter

Fault

Plates

Labeling

Label on the diagram:

Drag labels to their correct position on the image

Slower

Faster

​How Strong are Earthquakes?

·      Magnitude: the intensity of and energy of an earthquake

​Earthquake magnitude scales:

 

Richter scale: numerical scale of strength based on seismic waves (more precise)

Dropdown

The highest magnitude earthquake on the richter scale is ​

Select answer

​Modified Mercalli scale: measure of effect on people and building (subjective)

Multiple Select

Choose the TWO best options to stay safe or prepare for an earthquake.

• Go in your basement.

• Get to higher ground.

• Stay away from glass or mirrors.

• Get under a table or desk.

​ How do seismic waves indicate distance from an epicenter?

The closer a seismic station is to an epicenter:

1. The sooner the P-wave will arrive.

2. The smaller the difference between the P-wave and S-wave arrival times.

Labeling

Checkpoint - Seismogram: Determine the relative distance of each seismic station to the epicenter based on the seismograms for each station shown below. Label them with first closest, second closest, farthest. 

Drag labels to their correct position on the image

fartherst

Second closest

first closest

Dropdown

The outer core is made of: ​

Select answer

​

Select answer

do not travel through the outer core.

Multiple Choice

What causes a tsunami?

• A hurricane

• An Earthquake under the ocean

• An earthquake on the land

• A landslide

Multiple Choice

Are we at risk for tsunamis here in NYC?

• Yes

• No

Multiple Choice

Tsunamis are caused by

• underwater disturbances such as earthquakes, landslides, and volcanoes.

• wind and the gravitational pull of the moon.

Multiple Choice

If a tsunami is head to your area which of the following should you do?

• Climb a tall tree

• Go underground to a basement

• Go to higher ground like a hill or mountain

• Just stay and don't move from your area