According to Wegener’s hypothesis of continental drift,

the continents were once joined in a single landmass

Why did most geologists of Wegener’s time reject his hypothesis?

Wegener couldn’t explain how continents moved.

What evidence did Wegener have to support his hypothesis?

Fossils of freshwater reptiles are found separated by oceans

Evidence for sea-floor spreading has come from

stripes of magnetic minerals on the ocean floor.

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Q2 Review #2

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1
What can tectonic plates form when they converge?
a mountain range
a rift valley
new ocean lithosphere
a mid-ocean ridge
2
According to Wegener’s hypothesis of continental drift,
the continents were once joined in a single landmass
parts of the crust rose above sealevel, creating continents
Earth’s surface is made up of seven major landmasses.
erosion of Pangaea left oceans between remaining land masses
3
Why did most geologists of Wegener’s time reject his hypothesis?
Wegener couldn’t replicate his findings.
Wegener couldn’t explain how continents moved.
Wegener had no evidence to support his claims.
Most geologists did accept Wegener’s hypothesis as correct.
4
New oceanic lithosphere forms as a result of
continental drift.
heat and pressure.
subduction.
sea-floor spreading.
5
Tectonic plates consist of
oceanic crust.
lithosphere.
both continental and oceanic crust.
continental crust.
6
What type of boundary is formed when plates separate?
sea-floor spreading
divergent
transform
convergent
7
What is the outermost layer of the Earth called?
lithosphere
deep ocean trench
mantle
asthenosphere
8
What evidence did Wegener have to support his hypothesis?
matching patterns of magnetic stripes along some continents
Older rocks are farther away from the mid-ocean ridge.
Satellites found matching mountains on different continents
Fossils of freshwater reptiles are found separated by oceans
9
Movement of Earth’s tectonic plates is caused by
convection in the mantle.
subduction of denser ocean crust.
sea-floor spreading
the rock cycle.
10
Evidence for sea-floor spreading has come from
the breakup of Pangaea.
the shape of continental coastlines.
stripes of magnetic minerals on the ocean floor.
similar fossils in South America and Africa.
11
The process that breaks down granite into sediment is
deposition
erosion
crystallization
weathering
12
Mid-ocean ridges are the most common type of
transform boundary.
divergent boundary.
convergent boundary.
subduction zone.
13
The series of processes that that slowly change Earth’s rocks from one kind to another is the
rock cycle
metamorphism
weathering and erosion
convection

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