Unit 2 Exam

Which of the following increases as depth increases into the Earth? (choose all that apply)

• time

• Pressure

• temperature

• density

Tags

NGSS.HS-ESS2-3

Which layer contains BOTH the upper mantle and the crust?

• lithosphere
• atmosphere
• mesosphere
• athensosphere

Scientists have theorized that Earth's outer core is a molten liquid because

• all seismic waves are refracted at the depth of the outer core.
• P or primary waves disappear into the Earth's interior and do not resurface.
• S or Secondary waves pass through the center of Earth while primary waves do not.
• of the lack of S or secondary waves in the shadow zone.

Which BEST describes how we know about the main layers of the earth?

• Deep sea drilling has shown the evolution of basins by core drilling of ocean sediments and oceanic crust.
• The composition of lava extruded from volcanoes has given insight into the composition of the core.
• The development of SONAR mapping has given a clear picture of the depth of earth’s layers.
• Seismic waves will bend and reflect at the interfaces between the layers of the earth.

What is the correct order (starting from the surface) of Earth's layers?

• crust, outer core, inner core, mantle

• mantle, outer core, inner core, crust

• crust, mantle, outer core, inner core

• outer core, inner core, crust, mantle

Earth's outer core is best inferred to be

• liquid, with an average density of approximately 4 g/cm³

• liquid, with an average density of approximately 11 g/cm³

• solid, with an average density of approximately 4 g/cm³

• solid, with an average density of approximately 11 g/cm³

Tags

NGSS.HS-ESS2-3

At which depth below Earth's surface is the density most likely 10.5 grams per cubic centimeter?

• 1,500 km

• 2,000 km

• 3,500 km

• 6,000 km

What is the approximate temperature at the mantle-outer core boundary?

• 1,500 degrees c

• 4,500 degrees c

• 5,000 degrees c

• 7,000 degrees c

Tags

NGSS.HS-ESS2-3

At 4,500 kilometers below the surface of the Earth, the pressure is estimated to be

• 4 million atmospheres

• 2.0 million atmospheres

• 2.8 million atmospheres

• 3.1 million atmospheres

After a major earthquake, seismograph stations over most of Earth recorded P-waves, S-waves, or both. Some stations around Earth did not receive P-waves and S-waves at all. This "shadow zone," where seis­mograph stations did not record any direct P-waves or S-waves, exists because

• seismic waves are bent as they move from one substance to another

• no seismic waves can travel through Earth's liquid outer core

• liquids absorb P-waves but can transmit S-waves

• liquids absorb P-waves, and solids absorb s-wave