Why Earthquakes Occur

The point on Earth's surface directly above the focus.

• focus
• seismic waves
• epicenter
• amplitude

These occur when a mass of rock breaks deep beneath Earth's surface.

• earthquakes
• amplitude
• volcanoes
• a seismograph

Tags

NGSS.MS-ESS3-2

When pieces of rock snap back and move against each other along a fault, the movement releases….

• energy in the form of waves.
• volcanoes
• energy in the form of seismic waves.
• a seismograph

Tags

NGSS.MS-PS3-5

waves of energy that travel through Earth's surface

• ocean waves
• light waves
• radioactive waves
• seismic waves

Tags

NGSS.MS-ESS3-2

two types of seismic waves

• seismic data and sediment types
• primary and secondary waves
• primary and tertiary waves
• primary and tertiary waves

Tags

NGSS.HS-PS4-1

compressional waves

• primary waves
• secondary waves
• tertiary waves
• primary and secondary waves

P waves

• secondary waves
• progressional waves
• first waves
• primary waves

S waves

• secondary waves
• primary waves
• compressional waves
• tertiary waves

occur after an earthquake, some distance from a fault

• progressional waves
• primary waves
• secondary waves
• compressional waves

where an earthquake begins

• at the focus on the Earth's surface
• at the focus under the Earth's surface
• at the epicenter under the Earth's surface
• at the epicenter on the Earth's surface

Tags

NGSS.MS-ESS3-2