Sem1 Exam_EARTH_Plate Tectonics

Which layer of the Earth is the most dense?

• asthenosphere

• lithosphere

• mesosphere

• outer core

Which layer of the Earth is the thinnest?

• core

• crust

• geosphere

• mantle

What creates the magnetic field around the Earth?

• the energy of seismic waves

• the movement of tectonic plates

• the outer core spinning around the inner core

• the spinning of the Earth on its axis

The force exerted by tectonic plates as they plunge into the mantle due to their weight is called _______________.

• mantle convection

• ridge push

• slab pull

• subduction

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

The force exerted by tectonic plates as they move away from the divergent boundary is called _______________.

• mantle convection

• ridge push

• slab pull

• subduction

Tags

NGSS.MS-ESS2-3

Where is an earthquake’s epicenter located?

• point on Earth’s surface directly above the earthquake’s origin

• point on Earth’s surface directly below the earthquake’s origin

• point on Earth’s surface where the earthquake’s effects are strongest

• point on Earth’s surface where the earthquake’s effects are weakest

An area where no direct seismic waves from a particular wave can be detected is called __________.

• a shadow zone

• an inactive fault zone

• the atmosphere

• the mesosphere

What happens to P-waves and S-waves from an earthquake when they reach the outer core?

• Both P-waves and S-waves are transmitted through the outer core.

• Neither P-waves or S-waves are transmitted through the outer core.

• P-waves are transmitted through the outer core, but S-waves are not.

• S-waves are transmitted through the outer core, but P-waves are not.

The distance between an epicenter and seismogrpah’s location can be calculated by using the __________.

• amplitude of the P-wave

• arrival time of the first P-wave

• difference in arrival times between P- and S-waves

• energy released by an earthquake

What is the minimum number of seismograph stations needed to locate an earthquake epicenter?

• 1

• 2

• 3

• 5