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WorksheetsThe Earth
Total questions: 21
Worksheet time: 11mins
Name
Class
Date
1.
Of the four terrestrial planets, Earth is the _____
a)
largest
b)
second largest
c)
third largest
d)
smallest
2.
Unlike the other three terrestrial planets, Earth has _____
a)
liquid water
b)
an iron core
c)
polar ice caps
d)
carbon dioxide in the atmosphere
3.
Earth's inner core is solid, and made mostly of _____
a)
iron oxide
b)
nickel and cobalt
c)
iron and nickel
d)
nickel and copper
4.
What percentage of the radius of the Earth is comprised by the solid inner core?
a)
10%
b)
20%
c)
30%
d)
40%
5.
The outer core is mostly iron and nickel, but it’s _____
a)
unstable
b)
solid
c)
liquid
d)
radioactive
6.
The consistency of the mantle is like _____
a)
molten lava
b)
very thick hot plastic
c)
molasses in January
d)
moldable clay
7.
What is the name of the solid layer of rock, comprising Earth's outer surface?
a)
mantle
b)
crust
c)
outer core
d)
shell
8.
Earth's crust isn’t a solid piece; it’s broken up into large _____
a)
trays
b)
sheets
c)
platters
d)
plates
9.
Convection currents in the mantle cause warmer material to rise at a rate of a few _____
a)
centimeters per year
b)
meters per year
c)
kilometers per year
d)
meters per second
10.
The plates in the Earth's crust slide around at about the rate _____
a)
a snail moves
b)
your fingernails grow
c)
your hair grows
d)
bamboo grows
11.
Which part of the Earth is about as hot as the surface of the Sun?
a)
crust
b)
outer mantle
c)
inner mantle
d)
core
12.
Which element, deep inside the Earth, adds heat as it radioactively decays?
a)
iron
b)
thorium
c)
uranium
d)
plutonium
13.
Earth's magnetic field is mainly generated by _____
a)
convection of liquid in the outer core
b)
rotating solid in the inner core
c)
convection of liquid in the inner core
d)
rotating solid in the outer core
14.
How high is the Kármán line, the boundary between the Earth's atmosphere and outer space?
a)
10 km above sea level
b)
50 km above sea level
c)
100 km above sea level
d)
500 km above sea level
15.
Which gas comprises 78% of our atmosphere?
a)
oxygen
b)
nitrogen
c)
carbon dioxide
d)
argon
16.
What percent of our atmosphere is oxygen?
a)
35
b)
21
c)
15
d)
8
17.
Which atmospheric molecule is good at absorbing solar ultraviolet light?
a)
oxygen
b)
ozone
c)
carbon dioxide
d)
argon
18.
What is the name for Earth's natural light display, caused by energized solar wind particles?
a)
aorta
b)
aurora
c)
arrhythmia
d)
arboreal
19.
The atmosphere exerts a pressure on the surface of the Earth of about _____
a)
a kilogram per square centimeter
b)
a kilogram per square meter
c)
a gram per square centimeter
d)
a gram per square meter
20.
What percentage of the Earth's surface is covered in water?
a)
about 50%
b)
about 60%
c)
about 70%
d)
about 80%
21.
Which atmospheric molecule traps infrared light, leading to the greenhouse effect?
a)
oxygen
b)
ozone
c)
nitrogen
d)
carbon dioxide
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