8.9.1

Every few hundred thousand years the magnetic poles of Earth reverse. Rocks that contain iron provide a record of both normal and reversed magnetic poles. The pattern of normal and reversed magnetic poles as recorded in the rock on either side of the Mid-Atlantic Ridge provide evidence supporting Plate Tectonic Theory because -

• the bands of rock showing normal and reversed poles are not all the same width.

• the symmetric pattern shows where plates are moving away from each other.

• the composition of the rock changed every time the plates pushed against each other.

• deposits of iron in the rock were only made when the plates stopped moving.

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS2-2

The border between two tectonic plates lies below the state of California. The interaction of these two plates results in which of the following?

• Mild climate

• Rich, fertiel soil

• Frequent earthquakes

• Occasional wildfires

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS3-2

Plotting which of the following events on a map of the world would likely provide information on the location of tectonic plate boundaries?

• Tornados and hurricanes

• Surface ocean currents

• Locations of iron deposits

• Volcanic eruptions

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NGSS.MS-ESS2-3

Examining rocks that form on either side of the Mid-Atlantic Ridge provides evidence that supports the theory of Plate Tectonics. This is because we see evidence of plate movement in the fact that as we look at rocks farther and farther from the ridge, the rocks -

• have higher iron content.

• are made up of smaller particles.

• become thicker and thicker.

• are consistently older.

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NGSS.MS-ESS2-3

The most recently formed crust on Earth would be found where -

• plates are moving sideways past each other.

• one plate is sliding under another plate.

• two plates are pushing directly towards each other.

• two plates are moving apart from each other.

Tags

NGSS.MS-ESS2-3

Which type of tectonic plate movement results in the formation of mid-ocean ridges?

• Sliding past each other

• Pulling away from each other

• Pushing together and upwards

• One plate sliding under another

A river is running through the region represented by the topographic map shown here. In which portion of the river will the water be flowing fastest?

• Between Point 1 and 2

• Between Point 2 and 3

• Between Point 3 and 4

• Between Point 4 and 5

A topographic map of a region is provided. Which position indicated by the letters is at an elevation of 480 meters?

• W

• X

• Y

• Z

A river and four of its tributaries are identified by the satellite image pictured here. Which of the tributaries is flowing towards the south?

• Tributary 1

• Tributary 2

• Tributary 3

• Tributary 4

Tags

NGSS.MS-ESS2-4

A glacier is seen in the satellite image pictured here. In which general direction is the glacier moving as it grows down the mountain?

• North

• South

• East

• West