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WorksheetsEarth's Interior
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
What causes the lithosphere to crack under stress?
a)
heat
b)
magma
c)
brittle nature
d)
movement of plate tectonics
2.
Which crust is less dense and contains mostly silica-rich minerals?
a)
plate tectonics
b)
continental
c)
oceanic
d)
I do not know!
3.
How is new oceanic crust formed?
a)
It forms continually as lava rises from the mantle at mid-ocean ridges and cools into hard rock.
b)
It is formed and solidified over the next few billion years as Earth slowly cooled.
4.
Lava comes from the top part of the mantle called the ________.
a)
lithosphere
b)
crust
c)
asthenosphere
d)
continental crust
5.
It is a type of heat transfer. It is the same process that causes the circular, rolling motion of boiling water. It is the reason that the rocks flow in the asthenosphere.
a)
conduction
b)
radiation
c)
Convection
d)
All three.
6.
How does mantle convection occur?
a)
Thermal energy from deep inside Earth heats rock at the bottom of the asthenosphere.
b)
As early Earth became larger, its gravitational field increased. This compressed materials into rock, producing heat. Insulating layers of rock above conserved this heat.
c)
Additionally, a relatively small amount of this material was radioactive.
d)
All of the answers.
7.
The heat flow from the interior produces what?
a)
contraction of rocks
b)
thermal convection
c)
magma
d)
lava
8.
What do scientists use to map the mechanisms of thermal convection?
a)
the force
b)
seismographs
c)
seismic tomography
d)
drills
9.
How can the structure of Earth’s mantle be determined?
a)
Detectors in different locations on Earth measure the speed and intensity of these seismic waves, which are affected by the composition of the materials they pass through.
b)
By comparing the data from different earthquakes and different locations.
c)
First two answers.
d)
Drills used to travel into the Earth.
10.
Why is the outer core liquid? And why is the inner core a solid?
a)
Because its temperature exceeds the melting points of iron and nickel. Pressure from the weight of the planet is intense. The pressure on the inner core is so great, it does not melt.
b)
The magnetic field of the Earth counteracts the inner core.
c)
The temperature of the mantle is not hot enough to melt the inner core.
d)
All of the answers.
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