Plate tectonics review

The layers of Earth are the ________.

• hydrosphere, atmosphere, troposphere, outer core and inner core

• stratosphere, ionosphere, troposphere, outer core and inner core

• crust, mantle, outer core and inner core

• tectonic plates, faults, lithosphere and core

Answer explanation

The layers of Earth are the crust, mantle, outer core, and inner core. These layers make up the structure of our planet. The correct choice is 'crust, mantle, outer core and inner core.' This answer explanation highlights the layers mentioned in the question and provides a concise description of their composition.

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NGSS.MS-ESS2-1

A _________ plate boundary happens when two plates slide past each other.

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NGSS.MS-ESS2-3

A __________ plate boundary happens when two plates slowly crash into each other.

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NGSS.MS-ESS2-3

A ________ plate boundary happens when two plates slide apart.

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The hypothesis that continents move slowly is called ________________________________.

• plates

• lithosphere

• continental drift

• convection

Answer explanation

The hypothesis that continents move slowly is called continental drift. This theory suggests that the Earth's continents have shifted over time due to the movement of tectonic plates. The term 'continental drift' refers to the gradual movement of land masses across the Earth's surface. It is an important concept in the field of geology and helps explain various geological phenomena, such as the formation of mountain ranges and the distribution of fossils. The idea of continental drift revolutionized our understanding of Earth's history and continues to be a fundamental concept in the study of plate tectonics.

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NGSS.MS-ESS2-3

Name 2 pieces of evidence for continental drift.

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NGSS.MS-ESS2-3

All continents once might have been connected in a large landmass called _________________________.

• Mantle

• Pangaea

• asthenosphere

• plates

Answer explanation

The continents were once connected in a large landmass called Pangaea. This landmass eventually broke apart and the continents drifted to their current positions. Pangaea is the correct choice because it accurately describes the ancient supercontinent that existed millions of years ago. The other options, Mantle, asthenosphere, and plates, are not correct as they do not refer to the large landmass that once connected all continents. The question asks about the name of the landmass, not about geological terms like mantle, asthenosphere, or plates.

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NGSS.MS-ESS2-2

Are tectonic plates still moving today?

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NGSS.MS-ESS3-2

Name two types of natural disasters that often occur at plate boundaries.

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NGSS.MS-ESS3-2

Which scientist suggested the theory of seafloor spreading?

• Harry Hess

• Marie Tharp

• Alfred Wegner

Answer explanation

The theory of seafloor spreading was suggested by Harry Hess. This theory explains how new oceanic crust is formed at mid-ocean ridges and spreads outwards. It also provides an explanation for the movement of the Earth's tectonic plates. Harry Hess's proposal revolutionized our understanding of plate tectonics and the geological processes occurring beneath the ocean's surface.

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NGSS.MS-ESS2-3