WorksheetsEarth Science
Total questions: 16
Worksheet time: 7mins
Name
Class
Date
1.
The outermost layer of the earth is about 3 to 30 miles thick. It is called the
a)
mantle
b)
crust
c)
outer core
d)
inner core
2.
The second layer of the earth goes down 1800 miles. It is called the
a)
crust
b)
outer core
c)
inner core
d)
mantle
3.
Oldham found the earth's core when he saw that seismic waves from ___________ didn't go straight through the center of the earth.
a)
tidal waves
b)
earthquakes
c)
mountains
d)
ocean floors
4.
Lehmann discovered that the earth actually had two ________.
a)
mantles
b)
layers of crust
c)
cores
d)
atmospheres
5.
The inner core is made of iron that's almost as hot as the sun - why doesn't it melt?
a)
Iron doesn't melt
b)
That's not really very warm
c)
Pressure is super high
d)
Oceans cool it
6.
The moon is now much cooler that the earth. Why?
a)
Earth is bigger so cools slower
b)
Moon gets no sunlight
c)
Moon is actually warmer
d)
Earth has water on it
7.
Wegener wondered how fossil and living creatures
a)
ended up on different continents
b)
got frozen in ice
c)
died
d)
created earthquake waves
8.
Wegener noticed that the edges of some continents
a)
were exactly the same
b)
overlapped each other
c)
were covered with mountains
d)
fit together like puzzle pieces
9.
Scientists rejected Wegener's idea of Continental Drift because
a)
no fossil evidence for it
b)
continent shapes didn't fit
c)
didn't trust him
d)
no known mechanism
10.
Harry Hess found that the ocean floor was _____________ the farther it was from the mid-ocean ridge.
a)
older
b)
younger
c)
backwards
d)
opposite
11.
Harry Hess called his discovery __________________.
a)
plate tectonics
b)
sea floor spreading
c)
subduction
d)
volcanism
12.
HUGE slabs of rock called __________ float on molten rock below.
a)
plates
b)
mountains
c)
mid-ocean ridges
d)
mantle
13.
These are very common at plate boundaries.
a)
volcanoes
b)
oceans
c)
valleys
d)
glaciers
14.
Boundary where plates move right into one another.
a)
divergent
b)
convergent
c)
mountains
d)
transform
15.
Boundary where plates move away from each other.
a)
divergent
b)
convergent
c)
transform
d)
tectonic
16.
Boundary where plates slide past each other sideways.
a)
convergent
b)
divergent
c)
transform
d)
tectonic
100 %
