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Science 1st Unit Exam Reviewer > Plate Tectonic Theory > Flashcards

Plate Tectonic Theory Flashcards

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1
Q

True or False: The lithosphere is composed of oceanic and continental plates.

A

True

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2
Q

True or False: These plates are explained by the Plate Tectonic Theory.

A

True

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3
Q

The Plate Tectonic Theory is supported by _ and _.

A

Sea Floor Spreading and Continental Drift Theory

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4
Q

True or False: The Plate Tectonic Theory is evident because of some fossils, rocks, glacial deposits, climate changes, and paleomagnetism in different continents.

A

True

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5
Q

This theory associates earthquakes, volcanoes, mountains, and other geophysical phenomena to the interaction of the plates.

A

Plate Tectonic Theory

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6
Q

According to the Plate Tectonic Theory, the surface of the Earth is divided into…?

A

Moving Plates

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7
Q

The German scientist who noticed that continents are like puzzle pieces in the 1900s.

A

Alfred Wegener

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8
Q

Wegener hypothesized that the continents were one before, and it was called…?

A

Pangea

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9
Q

True or False: Wegener based his hypothesis on his puzzle piece set having the Earth as its design.

A

False. He based his hypothesis on the fitted edge of continental shorelines.

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10
Q

True or False: Wegener observed the difference of the geological features of different continents.

A

False. He observed the same geological features of the different continents.

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11
Q

True or False: Wegener observed the obscure shift of climate.

A

False. He observed the apparent shift of climate.

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12
Q

True or False: Wegener observed the Gondwana Sequence.

A

True

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13
Q

True or False: Scientists did not believe that the landmass could move kilometers away from each other.

A

True

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14
Q

True or False: In the 1940s, the paleomagnetism, convection current, and the seafloor spreading still did not confirm Wegener’s hypothesis.

A

False. In the 1940s, the paleomagnetism, convection current, and the sea floor spreading confirmed Wegener’s hypothesis.

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15
Q

This continuous cycle creates circular motion under the plates, causing the continents to move.

A

Convection Current

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16
Q

True or False: The lower mantle is hotter than the upper mantle.

A

True

17
Q

The cooler materials of the mantle sink to the core, which will (increase or decrease?) their temperature.

A

Increase

18
Q

As the (cooler or warmer?) materials sink, the hotter materials rise to fill up the spaces left by the cooler ones.

A

Cooler

19
Q

True or False: The continents are drifting at a rate of 5-10 m per year.

A

False. The continents are drifting at a rate of 5-10 cm per year.

20
Q

True or False: After 10 million years, significant changes can be seen.

A

False. After 50 million years, significant changes can be seen.

21
Q

True or False: In 50 million years, the Atlantic and Indian Oceans will become larger.

A

True

22
Q

True or False: In 50 million years, Pacific Ocean will also become larger.

A

False. In 50 million years, Pacific Ocean will become smaller.

23
Q

True or False: In 50 million years, there will be an Australia-Asia collision.

A

True

24
Q

True or False: In 50 million years, Mediterranean Sea will disappear as Africa drifts north.

A

True

25
Q

Who was the US Navy man led the discovery of spreading seafloor in the 1900s?

A

Harry Hess

26
Q

Hess and his team discovered underwater mountains. What is it called?

A

Mid-Ocean Ridge.

27
Q

A mid-ocean ridge has a deep crack which runs through the center. What is it called?

A

Rift Valley

28
Q

The crack of the ridge leaks with magma which solidifies to become a…?

A

Seafloor

29
Q

True or False: Because of convection, more magma is coming out, then solidified.

A

True

30
Q

True or False: The younger sea floor pushes away the old sea floor, causing it to spread bringing with them the continents.

A

True

31
Q

True or False: Old rocks underwater are near from mid-oceanic ridge.

A

False. Old rocks underwater are far from mid-oceanic ridge.

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