Plate Tectonics Introduction

Why do tectonic plates move?

• Due to active volcanism and earthquakes.

• Due to current convection in the mantle.

• Due to Earth’s gravitational force.

• Due to Earth’s rotation.

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NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Which statement is TRUE about Continental Drift Theory?

• Based on the distribution of rock types, fossils, and structures of continents.

• Accepted by most geologists during Wegener’s time.

• Based on oceanic fossils and basalt

• Suggested that the original landforms were large islands.

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NGSS.MS-ESS2-3

The theory of _________ states that as the ocean floors move, it carries the continents too.

• Continental Drift Theory

• Plate Tectonic Theory

• Seafloor Spreading Theory

• Pangaea Proxima

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NGSS.MS-ESS2-3

It is a jelly-like structure located on the uppermost part of the mantle where plates float.

• Asthenosphere

• Lithosphere

• Outer core

• Mantle

According to the Theory of Harry Hess, continents move because of _________

• the molten material within the Earth.

• the shaking of grounds.

• the climate change that continuously happening on

  Earth.

• the unbalanced force exerted in the innermost layer of the Earth.

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NGSS.MS-ESS2-3

How many major plates are there on Earth's surface?

• 15

• 8

• 7

• I don't know.

Oceanic crust is on average how thick?

• 40-70 km

• 2900 km

• 5-10 km

• 2700 km

Why did Christopher Scotese change the term he used to describe his prediction of Pangaea Ultima?

• because he believed that the Earth is continuously undergoing changes through the movement of the mantle because of the force exerted.

• because he believed that the plates on Earth would stop moving and changing after 250 million years.

• because he believed that continents on the Earth surface are in constant motion.

• because he believed that plates on the surface of the Earth would remain the same after 250 million years.

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NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

Which of the following plates does NOT belong to the group?

• Philippine Plate

• Arabian Plate

• African Plate

• Cocos Plate

Convection current causes the lithospheric plate to ________________.

• move faster and constantly.

• move slowly but constantly.

• remain stationary.

• create another plate

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NGSS.MS-ESS2-3