Review for Plate Tectonics Unit Assessment

The semi-solid upper mantle, where convection currents occur, is called the _____________.

• asthenosphere

• core

• oceanic crust

The inner core of the Earth is best described as __________.

• molten and made of heavy metals

• solid and made of heavy metals

• semi solid and made of heavy metals

Tags

NGSS.HS-ESS2-3

When convection currents occur below the crustal plates, __________________________.

• warm molten material rises and cool molten material sinks.

• cool molten material and warm molten material sink.

• cool molten material and warm molten material rise.

What is true in a convection current as its density decreases?

• The molten material decreases in temperature.

• The molten material increases in temperature.

Tags

NGSS.MS-PS3-4

What do the convection currents do to Earth’s crust?

• Convection currents cause Earth’s crust to move.

• Convection currents force molten material to rise to the ocean floor.

• Both of these are true.

Tags

NGSS.MS-ESS2-3

The rate at which crustal plates move in one year can best be measured in ___________.

• cm.

• meters.

• miles.

Tags

NGSS.MS-ESS2-3

According to Alfred Wegener’s Theory of Continental Drift, ___________________.

• the continents do not move at all and are stationary.

• Earth is slowly cooling and shrinking over millions of years.

• the continents were once joined together in one landmass.

Tags

NGSS.MS-ESS2-3

Scientists rejected Wegener’s theory because he could not ____________________.

• describe the climate of Pangaea

• explain how the continents could move

• describe how seeds moved from Africa to South America

What is the Theory of Plate Tectonics?

• The theory that the Earth’s crust is made of plates that move.

• The theory that all plates are moving in the same direction on Earth’s surface

• The theory that explains how all plates form at trenches along the mid-ocean ridge

Tags

NGSS.MS-ESS2-3

How does Continental Drift Theory support, or connect to, the Theory of Plate Tectonics?

• The Continental Drift Theory explains how the plates move and what moves the plates on Earth’s surface

• The Continental Drift Theory explains how convection currents move the ocean floor as new crust is created at mid-ocean ridges and recycled at trenches.

• The Continental Drift Theory explains how evidence of landforms and other Earth features align and therefore, moved from their connected, single landmass to their current locations.

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1