Question 1 (1 point) Which of the following evidence was NOT cited by Alfred Weg

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Question 1 (1 point)

Which of the following evidence was NOT cited by Alfred Wegener as support for his hypothesis of continental drift?

Question 1 options:

A)

Jigsaw puzzle fit of the continents

B)

Existence of identical fossils separated by oceans

C)

Mountains of comparable age and structures on separate continents

D)

Existence of oceanic ridges produced by seafloor spreading

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Question 2 (1 point)

Why was Alfred Wegener's hypothesis of continental drift rejected?

Question 2 options:

A)

It was not supported by empirical evidence.

B)

It lacked a credible explanation for the mechanism for continental drift.

C)

Other scientists clearly demonstrated that Pangaea could never have existed.

D)

It challenged the long-held assumption that continents and oceans had fixed geographic positions.

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Question 3 (1 point)

Which of the following statements is NOT true?

Question 3 options:

A)

Oceanic crust is more dense than continental crust.

B)

The lithosphere responds to forces by bending or breaking while the asthenosphere behaves by flowing.

C)

Dense lithospheric plates float on top of the liquid asthenosphere layer.

D)

Continental lithosphere tends to be thicker than oceanic lithosphere.

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Question 4 (1 point)

Which of the following statements is true about Earths' tectonic plates and boundaries?

Question 4 options:

A)

The northern edge of the Pacific Plate is colliding with the North American Plate.

B)

Plates are all roughly the same size.

C)

Plates are defined entirely by continental margins.

D)

The majority of plate boundaries that bisect the oceans are transform.

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Question 5 (1 point)

New ocean floor is generated along ______________.

Question 5 options:

A)

subduction zones

B)

mid-ocean ridges

C)

ocean trenches

D)

continental volcanic arcs

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Question 6 (1 point)

Which modern-day feature provides us a view of how the Atlantic Ocean may have formed?

Question 6 options:

A)

San Andreas Fault

B)

Mariana Trench

C)

Red Sea

D)

Himalayan Mountains

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Question 7 (1 point)

Which of the following statements is true about the Himalayan Mountains?

Question 7 options:

A)

They formed from subduction of the Indian Plate beneath the Eurasian Plate.

B)

They formed from the buckling of continental crust colliding with other continental crust.

C)

They formed from the partial melting of continental crust.

D)

They are a relatively young volcanic arc system.

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Question 8 (1 point)

Transform plate boundaries _____.

Question 8 options:

A)

mostly offset segments of the oceanic ridge system

B)

are also called destructive boundaries

C)

are the type of boundaries responsible for part of California someday falling into the ocean

D)

All of the above

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Question 9 (1 point)

Which of the following is NOT evidence supporting the theory of plate tectonics?

Question 9 options:

A)

Alternating stripes of normal and reverse polarity parallel mid-ocean ridges

B)

The age of the inactive volcanic islands that make up the Hawaiian island chain increases with increasing distance from the youngest and most volcanically active island.

C)

Oceanic crust decreases in age with increasing distance form mid-ocean ridges

D)

Sediment thickness increases with increasing distance form the mid-ocean ridges

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Question 10 (1 point)

Which of the following is a major driving force of plate motion?

Question 10 options:

A)

Mantle convection

B)

Ridge push

C)

Slab pull

D)

All of the above

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A)

Jigsaw puzzle fit of the continents

B)

Existence of identical fossils separated by oceans

C)

Mountains of comparable age and structures on separate continents

D)

Existence of oceanic ridges produced by seafloor spreading

Explanation / Answer

1-C) Mountains of comparable age and structures on separate continents.

2-B) although wegener tried many times to prove continental drift to the world by his hypothesis theory. as drift due to earth's rotation and due to moon gravitational effect on earth ,but he failed to convince all the time because it lacked a credible explanation for the mechansim for continental drift.

5-B) new ocean floor is generated along mid ocean ridges.

6-D) atlantic ocean was not present million of years back , but it is considered that movement of plate tectonic away from each other and forming different continents (known as break up of pangaea) resulted in the opening of thr atlantic ocean ,so Himalayan mountains is the modern feature that provides how atlantic was formed because the himalayas are still growing each year by subduction of two tectonic plates.

7-A) They formed from subduction of the Indian Plate beneath the Eurasian Plate.

8-A) mostly offset segments of the oceanic ridge system.

9-C) this is not the correct evidence instead . The age of oceanic crust increases with increasing distance from a mid-ocean ridge, but it is given decreases so rest are correct evidences except option C.

10-D) all the above are the major driving force of plate motion.

due to intense heat in the earth's core molten rock moves in layers(mantle layers), that too in cells known as convection , cells,such movement is called mantle convection.

slab pull occurs when an oceanic plate subducts into the underlying mantle.

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