NEW
Font size
S
M
L
XL
WorksheetsLayers of the Earth and Continental Drift
Total questions: 20
Worksheet time: 12mins
Name
Class
Date
1.
As you travel from the inner core to the crust, how would temperature, pressure and density of the material change?
a)
The would all increase
b)
The would all decrease.
c)
Nothing, the layers are made of the same material throughout
d)
Temperature would decrease, but pressure and density would increase
2.
The deepest borehole ever drilled was the Kola Superdeep Borehole located in Russia. It's depth is approximately 12 Km. To reach the center of Earth, we would need to drill over 6,000 Km. How do scientists study the deepest part of Earth if we've only drilled a fraction of the way through the crust?
a)
By sending humans directly into the inner core
b)
By visiting deep mines that go deep into the inner core
c)
Sending robots deep into the inner core
d)
By recording and studying seismic waves (earthquake P and S
waves)
3.
Scientists think that convection currents that move the plates flow in Earth's
a)
Continental crust
b)
oceanic crust
c)
Asthenosphere
d)
Lithosphere
4.
Which type of evidence was NOT used by Alfred Wegener to support his continental drift hypothesis?
a)
Similar mountain ranges found on the eastern side of South America and the western side of Africa.
b)
Identical fossils found on different continents.
c)
Tropical plant fossils found in S. America.
d)
Glacial erosion found in Australia and Africa.
5.
When the heat source is removed from a fluid, the convection current will
a)
stop immediately
b)
change directions
c)
eventually stop
d)
speed up
6.
Where does molten material from the mantle rise up during the process of sea-floor spreading?
a)
Along the mid-ocean ridge
b)
At the north and south poles
c)
Along the edges of all the continents near the
shoreline and beaches
d)
at the equator
7.
Geologist believe the inner core is solid but hotter than the outer core which is liquid. What is their reasoning for this?
a)
This is not what they believe. Instead they think the inner core is liquid because with depth temperature increases causing the iron to melt.
b)
Because Earth is a sphere the interior takes on the same shape.
c)
Because all of the pressure from the overlying layers force the material to be a solid despite the hot temperatures.
d)
They have no evidence to support this claim, its just a guess.
8.
The mantle of Earth is made of a plastic like material that when its heated, the material rises, cools, sinks and is then re-heated. This constant flow of a fluid is called
a)
a conduction current
b)
a hot spot
c)
a volcanic eruption
d)
a convection current
9.
In the early 1900's Alfred Wegener found evidence of identical rock types, identical fossils, and matching mountain ranges on different continents that are on opposite sides of an ocean. What could be the explanation for these observations?
a)
All animals can swim extremely long distances
b)
These observations have no significant meaning.
c)
In the past, continents were not located where they are today but were joined together
d)
mountains are made through the same processes therefore they are very similar in their structure throughout the entire world.
10.
How does sea floor spreading occur?
a)
It is a myth and does not occur.
b)
At mid-ocean ridges, magma is forced upward and slowly spreads the plates
c)
Organic material forms limestone on the ocean
d)
The pressure from the ocean water forces down on the sea floor and moves it
11.
According to Wegener's hypothesis of continental drift,
a)
Earth is shrinking
b)
The continents do not move, they only appear to drift.
c)
The Earth once had great land bridges that connected the continents.
d)
The continents were once joined and have since drifted apart.
12.
Why was Alfred Wegener's hypothesis of Continental Drift not accepted by the scientific community of his time?
a)
Because he was a meteorologist and only a geologist could make such a claim.
b)
Because he had no evidence to help support his hypothesis.
c)
Because he had too much evidence to support his claim which made his hypothesis confusing.
d)
because he could not effectively describe the force that caused the continents to move.
13.
All of the statements below supported the Theory of Continental Drift, EXECPT
a)
Continents look like they fit together like puzzle pieces, especially South America and Africa.
b)
Antarctica's land forms shows evidence of glacial erosion.
c)
Fossils match on different continents
d)
Rock formations match on different continents
14.
Which main layer is more dense than the crust but less dense than the outer core?
a)
mantle
b)
inner core
c)
outer core
d)
crust
15.
How would you describe the outer-core?
a)
liquid nitrogen
b)
liquid iron-rich
c)
solid iron-rich
d)
neither liquid nor solid, but plastic like layer
16.
The Earth is made up of two types of crust. Which is more dense?
a)
Oceanic crust -basalt
b)
Oceanic crust- granite
c)
Continental crust- granite
d)
continental crust- basalt
17.
Which layer does the lithosphere (the outer most layer plus the crust) float on top of?
a)
the crust
b)
lithosphere
c)
asthenosphere
d)
outer core
18.
What information is used to determine when one layer of earth stops and the next layer ends?
a)
temperature
b)
mineral composition
c)
density
d)
all of the following is used
19.
Where can the youngest rocks on Earth be found?
a)
along the coastlines of continents
b)
in the tallest mountain ranges on Earth
c)
at deep-ocean trenches where subduction occurs
d)
along the center of the mid-ocean ridges where sea-floor spreading occurs.
20.
Which layer of Earth makes up the crust and the upper most part of the mantle. This is the rigid layer that is broken into sections called plates.
a)
Crust
b)
Lithosphere
c)
Asthenosphere
d)
Mantle
Reset
