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Plate Tectonics
Plate Tectonics
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chapter 5 plate tectonics. 7th grade science. mrs. champion.
Flashcards
28 cards
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Practice quiz
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Questions
28
Answers
1
Plates slip past each other along a _______ boundary.
convergent
subduction
transform
divergent
2
What was Alfred Wegener's hypothesis about the continents.
Mountain ranges formed when continental plates collided.
The continents were joined together and then drifted apart
There have always been 7 distinct continents.
The continents rest on plates that move slowly over time.
3
When two pieces of continental crust collide at a converging boundary, a ______ is produced.
rift valley
mountain range
mid-ocean ridge
convergent boundary
4
What did Wegener name the supercontinent he described?
Panini
Pangrava
Pangea
Palermo
5
Plates move apart from each other at a _________ boundary.
convergent
transform
divergent
subduction
6
This is funny, right?
Hilarious- good one!
I don't get it
Yes, it's funny!
I'm laughing too hard to choose an answer.
7
Oceanic crust near the mid-ocean ridge...
younger than crust further from the ridge.
more wet than crust further from the ridge.
is not different from crust further from the ridge.
contains more fossils than crust further from the ridge.
8
What is the idea that the continents slowly moved over the Earth's surface in the past?
plate tectonics
continental drift
supercontinental drift theory
divergent boundaries
9
According to the plate tectonic theory, what drives the movement of the plates?
sea-floor spreading
the Earth's magnetic field
converging and diverging boundaries
convection currents in the mantle
10
Alfred Wegener supported his continental drift theory using evidence from...
fossil records and ocean floor mapping
Marie Tharp's mapping the ocean floor using sonar
landforms, fossils, and sea-floor spreading
landforms, fossils, and climate
11
Just for fun...
good one!
I didn't know there were so many awesome science jokes!
I don't get it
funny!
12
Plates that come together are called a _______ boundary.
convergent
transform
subduction
divergent
13
What do you call the process where new material is continually added to the ocean floor?
mid-ocean ridge
deep-ocean trench
mountain range
sea-floor spreading
14
What is the rising of warm magma and the sinking of cooler magma inside the mantle known as?
plate tectonics
conduction
convection currents
a convergent boundary
15
What do you call a long chain of mountains that rise from the ocean floor?
deep-ocean trench
mid-ocean ridge
mountain range
sea-floor spreading
16
Sea-floor spreading happens when molten material rises __________________.
from volcanoes on the continental crust
at the boundary of each plate
along mid-ocean ridges
in the deep-ocean trenches
17
What do scientists believe causes the movement of the Earth's plates?
convection currents in the mantle
seismic action
sea-floor spreading
Earth's magnetic field
18
What happens when two oceanic plates collide?
one bends under the other and causes a trench
they squeeze the crust upward into a mountain range
the oceanic plate slides beneath the continental plate
all options are possible
19
A tropical plant fossil was found on an island in the Arctic.This is used as evidence for what?
The theory of plate tectonics.
Sea-floor spreading.
continental drift changed the climate.
A supercontinent once existed.
20
What do you call it when the ocean floor sinks beneath a deep-ocean trench into the mantle?
subduction
transform
divergent
convergent
21
Which theory states that pieces of the Earth's lithosphere are in continuous, slow motion?
plate tectonic theory
lithosphere movement theory
continental drift theory
Pangea theory
22
Why did most geologists of Wegener's time reject his hypothesis?
He couldn't explain the fossil records.
They did not like Wegener.
He couldn't explain what caused the continents to drift.
He had no evidence to support his hypothesis.
23
What is any trace of an ancient organism that has been preserved in a rock called?
continent
rift
fossil
Pangea
24
What happens when two continental plates collide?
the oceanic plate slides beneath the continental plate
each of these could happen
the crust is squeezed upward into a mountain
one slides under the other and forms a trench
25
What is the name of the freshwater reptile that Wegener used as evidence for his hypothesis?
Glossopteris
Spitsbergen
Mesosaurus
Glacialsaurus
26
The pattern of magnetic stripes on rocks is evidence for _______________.
convection currents
continental drift
Pangea (a supercontinent)
sea-floor spreading
27
What device used sound waves to help map the mid-ocean ridges in the mid- 1900s?
laser
ridgeometer
sonar
seismograph
28
What happens when a continental plate and an oceanic plate collide?
the oceanic plate slides under the continental plate
they squeeze the crust upward forming a mountain
one slides under the other forming a trench
Each of these could happen
