According to Wegener's hypothesis of continental drift,

the continents were once joined together in a single landmass

Earth's surface is made up of seven major landmasses

Earth is slowly cooling and shrinking

the name of the super-continent that existed millions of years ago

another name for continental drift

Most geologists rejected Alfred Wegener's idea of continental drift because...

Wegener could not identify the force that moved the continents

it did not agree with their current theory

Wegener was interested in what Earth was like millions of years ago

Wegener used several different types of evidence to support his hypothesis

In Seafloor Spreading, molten material rises from the mantle and erupts or flows out

along the edges of all the continents

How did scientists discover that rocks farther away from mid-ocean ridges were older than those near it?

by determining the age or rock samples obtained by drilling on the seafloor

by observing eruptions of molten material on the seafloor

by mapping rocks on the sea floor using sonar

by measuring how fast seafloor spreading occurs

What discovery caused scientists to rethink Wegener's continental drift theory?

discovery of seafloor spreading in the Atlantic Ocean

discovery of earthquake activity in California

discovery of the ring of fire in the Pacific Ocean

discovery of deep trenches off the coast of South America

What were magnetic stripes on the ocean floor used to prove?

the seafloor was spreading outward from the mid-Atlantic ridge

the seafloor was spreading inward toward the mid-Atlantic ridge

the seafloor was effectively stationary

natural magnetic rocks always form in the mantle of the Earth

The youngest rocks on the seafloor are most likely found...

farthest from a mid-ocean ridge

At a convergent boundary, how can you determine which plate will be subducted under the other?

the denser plate is subducted under the less dense plate

the younger plate is subducted under the older plate

the plate nearest the poles is subducted under the plate nearer the equator

the plate with greater magnetic properties will be subducted under the less magnetic plate

The Alps are increasing in eleveation due to...

transform faulting of a tectonic plate

The Andes Mountains are a volcanic mountain range located on the western coast of South America. The plate boundary located in this region is most likely an area of-

subduction because the plates are colliding

folded mountains because the plates are colliding

mid-ocean ridges because the plates are pulling apart

ocean-floor spreading because the plates are spreading apart

The Himalayas are formed because of what kind of plate movement?

two continental plates colliding

a continental plate being subducted under another

two plates sliding past one another

The San Andreas Fault is a crack in the Earth's crust that runs the length of California. What plate boundary feature caused this?

an inactive convergent boundary

What geologic process formed the Himalayas?

two continental plates converging

an earthquake in a subduction zone

a tectonic plate moving over a hot spot

movement at a transform fault boundary

Which of the following DOES NOT provide evidence that the continents were once joined together?

ancient maps left by early humans showing only one large continent

fossils of the same reptiles found on different continents

different continents having rocks of the same age and type

coastlines of some continents matching up

Tectonic plate movements result in the formation of an mid-ocean ridge when...

plates slide horizontally by each other

What happens when an oceanic plate collides with a continental plate?

the denser oceanic plate slides under the less dense continental plate

the denser oceanic plate slides on top of the less dense continental plate

the less dense oceanic plate slides under the denser continental plate

the less dense oceanic plate slides past the denser continental plate

What is the theory of continental drift?

the belief that continents have moved slowly apart to their current locations

the belief that continents have always been located at their current locations

the belief that new seafloor is continually being created at spreading centers

the belief that continents are slowly sinking into the asthenosphere

What is a magnetic field reversal?

when Earth's magnetic field is flipped so that the positions of magnetic north and magnetic south are interchanged

when Earth's magnetic field suddenly disappears for short periods of time

when Earth's magnetic field suddenly runs east/west instead of south/north

If you used the theory of plate tectonics to predict the most likely place for the next volcanic eruption, you should predict that it is most likely to occur...

along boundaries between colliding lithospheric plates

where one has not happened in at least 10 million years

in the interior of any continent

where a continental lithospheric plate is being subducted beneath an oceanic lithospheric plate

The theory of continental drift DID NOT adequately account for which of the following?

why continents drifted across Earth's surface

why similar rock types were found on continents separated by oceans

why similar fossils were found on continents separated by oceans

why the coastlines of some continents appeared to fit together

Plate Tectonics

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Plate Tectonics

75 questions

Which type of plate boundary would cause folded mountains to form?

The Great Rift Valley in Africa and the Mid-Atlantic Ridge were both created by this type of plate boundary.

What are the two types of crust?

What drives tectonic plate movement?

Earthquakes and volcanoes are most likely found in which locations?

When one plate slides underneath another, it and the magma _.

Transform boundaries are most likely to produce what phenomenon?

When an oceanic plate and a continental plate collide, which one will subduct?

Two tectonic plates collide at a ___ plate boundary.

This landform can occur at a divergent plate boundary.

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Plate Tectonics

75 questions

Which type of plate boundary would cause folded mountains to form?

The Great Rift Valley in Africa and the Mid-Atlantic Ridge were both created by this type of plate boundary.

What are the two types of crust?

What drives tectonic plate movement?

Earthquakes and volcanoes are most likely found in which locations?

When one plate slides underneath another, it ____ and the magma _____.

Transform boundaries are most likely to produce what phenomenon?

When an oceanic plate and a continental plate collide, which one will subduct?

Two tectonic plates collide at a ___ plate boundary.

This landform can occur at a divergent plate boundary.

Access all questions and much more by creating a free account

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When one plate slides underneath another, it and the magma _.