Exploring Earthquakes and Tectonic Activity

The Pacific region experiences more damaging earthquakes than any other area in the U.S. due to tectonic plate movements. Earth's crust is divided into tectonic plates that move over the mantle. The collision of these plates along the West Coast creates pressure, forming mountain ranges and volcanoes. Fault lines, like the San Andreas Fault, develop where plates meet. The Pacific plate and North American plate move at different rates, causing pressure that leads to earthquakes. These earthquakes, especially near the San Andreas Fault, result in significant property damage and loss of life.

Which region in the United States is most prone to damaging earthquakes?

• The Southern region

• The Atlantic region

• The Pacific region

• The Midwest region

Tags

NGSS.MS-ESS3-2

What are the broad pieces that Earth's outer crust is divided into called?

• Tectonic plates

• Continental shelves

• Mantle layers

• Oceanic ridges

Tags

NGSS.MS-ESS2-3

What is the softer layer beneath the tectonic plates called?

• Core

• Lithosphere

• Crust

• Mantle

Where do the edges of two massive tectonic plates meet along America's west coast?

• The Appalachian Mountains

• The San Andreas Fault

• The Gulf of Mexico

• The Rocky Mountains

What happens when the edges of tectonic plates slip past each other?

• A tsunami forms

• A volcano erupts

• An earthquake occurs

• A mountain range forms

Tags

NGSS.MS-ESS3-2

Which tectonic plate forms most of the seafloor of the Pacific Ocean?

• The South American Plate

• The Eurasian Plate

• The African Plate

• The Pacific Plate

Tags

NGSS.MS-ESS2-3

What is the result of the frequent earthquakes near California's San Andreas Fault?

• Significant property damage and loss of life

• Formation of new islands

• Increased tourism

• Reduction in volcanic activity

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS3-2

What builds up when tectonic plates move at different rates on opposite sides of the San Andreas Fault?

• Tremendous pressure

• New landmasses

• Ocean currents

• Atmospheric changes

Tags

NGSS.MS-ESS2-2