ES Earth's Interior

Alternating parallel bands of normal and reversed magnetic polarity are found in the basaltic bedrock on either side of the

• Mid-Atlantic Ridge

• Yellowstone Hot Spot

• San Andreas Fault

• Peru-Chile Trench

In which cross section below do the arrows best show the convection occurring within the asthenosphere beneath line XY?

• 1

• 2

• 3

• 4

Samples of ocean floor bedrock were collected at points A, B, C and D. Which sequence shows the correct order of the age of the bedrock from oldest to youngest?

• D>C>B>A

• A>D>B>C

• C>B>D>A

• A>B>D>C

Which observation about the Mid-Atlantic Ridge region provides the best evidence that the seafloor has been spreading for millions of years?

• the bedrock of the ridge and nearby seafloor is igneous rock

• the ridge is the location of irregular volcanic eruptions

• several faults cut across the ridge and nearby seafloor

• seafloor bedrock is younger near the ridge and older farther away

Active volcanoes are most abundant along the

• edges of tectonic plates

• equatorial ocean floor

• 23.5^oN and 23.5^oS parallels of latitude

• eastern coastlines of continents

What are the inferred pressure and temperature at the boundary of Earth's stiffer mantle and outer core?

• 1.5 million atmospheres pressure and an interior temperature of 4950°C

• 1.5 million atmospheres pressure and an interior temperature of 6200°C

• 3.1 million atmospheres pressure and an interior temperature of 4950°C

• 3.1 million atmospheres pressure and an interior temperature of 6200°C

The Moho is a boundary located in zone

• A

• B

• C

• D

Which diagram below best represents the pattern of magnetic orientation in the seafloor on the west (left) side of the ocean ridge?

• 
• 
• 
• 

Which inference can best be made from the diagram?

• The orientation of the Earth's magnetic field has reversed with time.

• The size of the continents has changed with time.

• The elevation of sea level has changed with time.

• The amount of fossil material preserved in the igneous rock has changed with time.

Which layer of the earth is completely Liquid?

• Crust
• Mantle
• Outer Core
• Inner Core