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Planets Review
Planets Review
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Planets (9th Grade Earth Science)
Flashcards
52 cards
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Practice quiz
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Questions
52
Answers
1
Which planet is smaller than Earth?
Neptune
Jupiter
Mars
Uranus
2
This planet has a very dense atmosphere composed of carbon dioxide. Extreme greenhouse effect
Mercury
Earth
Uranus
Venus
3
The closest planet to the sun is ...
Mars
Earth
Venus
Mercury
4
Rocky debris left over from the formation of the solar system or from the collisions of other bodies
asteriods
comets
planets
supernovas
5
Why is Pluto now catagorized as a dwarf planet?
its made of gases
it hasn't cleared its own orbit
its not big enough
its too far away from the sun
6
Which is NOT a characteristic of the four inner planets?
solid crust
smaller mass
composed of hydrogen and helium
no or few moons
7
Because of Earth's significant tilt, Earth experiences >>>>>
a magnetic field
different seasons
weather
gravity
8
Which is not a characteristic of a "Gas Giant"?
dense mantle
no solid surface
possible solid core
many rings
9
The Kuiper Belt is a disc-shaped region of icy and rocky objects located ....
just outside the orbit of Neptune
orbiting Saturn
between Mars and Jupiter
beyond the Oort Cloud
10
The sun (as all stars are) is composed of ......
carbon dioxide and argon
iron and nickel
oxygen and nitrogen
hydrogen and helium
11
Why does Mars have a red appearance?
Aliens!!!!!!
oxidation of iron rich soil
light refracted through the planets very thick atmosphere
presence of methane in the atmosphere
12
One Astronomical Unit (AU) is ....
The gravitational force of Earth
The average temperature of Pluto
the distance from Earth to Mars
the distance from the sun to Earth
13
Which planet has the longest orbital period or "year"?
Neptune
Earth
Mercury
Jupiter
14
This planet rotates on a horizontal axis around the sun. Appears to "roll" around the sun.
Earth
Uranus
Jupiter
Mars
15
The movement of turning on your axis.
orbit
inertia
revolution
rotation
16
Which planet has the thickest atmosphere (the highest air pressure)?
Mercury
Mars
Venus
Earth
17
The sun appears to pass directly overhead on the spring and fall equinoxes at the _______
equator
south pole
Tropic of Cancer
north pole
18
Which season is the northern hemisphere experiencing now?
winter
summer
19
What is unique about Earth in our solar system?
Earth has the largest moon
The Earth experiences seasons
Earth contain water as a gas, liquid, and solid.
Earth has a strong magnetic field
20
What is unique about some of Jupiter and Saturn's moons?
icy surface with possible liquid water beneath
breathable atmosphere
presence of single celled life
composed of hydrogen and methane
21
Mars day temperature is 70
o
, night is -240
o
. Why the huge difference?
it is so far away from the sun
the tilt of its axis is 90o
heat can escape due to thin atmosphere
Mars gravity is so small
22
Which is more likely to "hold on" to an atmosphere?
large planet
a planet without a magnetic field
small planet
a planet with a large moon
23
Which object is NOT a part of our solar system?
Pluto
our sun
the asteroid belt
The star Proxima Centuari
24
Stars fuse ______ atoms into helium to create energy.
carbon
iron
hydrogen
oxygen
25
Which planet has the shortest orbital period or "year"?
Earth
Neptune
Venus
Mercury
26
These horizontal lines are .....
international date line
longitude
prime meridian
latitude
27
A "Great Red Spot", a violent storm twice the size of Earth can be found on ......
Mars
Saturn
Jupiter
Mercury
28
In 1976, Viking I landing on this planet and took this picture
Mars
Venus
Alderaan
Mercury
29
Which planet is located between Mars and Venus?
Earth
Neptune
Mercury
Jupiter
30
Line of longitude measure distances _________ of the prime meridian.
east and west
north and south
31
The presence of a magnetic field around a planet gives indication of .....
an atmosphere
geologically dead planet
retrograde rotation
rotation of a large solid core
32
This planet resembles Earth's moon in that it does not have an atmosphere and has many craters.
Jupiter
Earth
Mercury
Mars
33
The atmosphere of all the Gas Giants are mostly composed of ......
hydrogen and helium
oxygen and nitrogen
carbon dioxide and methane
carbon dioxide and ammonia
34
Where did Mars' two natural satellites probably come from?
small planets that got captured by Mars' gravity
asteroids captured by Mars' gravty
result of a collision with Mars
volcanic activity
35
The time it takes for a body to complete one revolution around a central body?
orbital period
solar day
rotation
light speed
36
What is located between Mars and Jupiter?
asteroid belt
Pluto
Earth
Kuiper belt
37
Without a magnetic field what will most likey happen to your atmosphere?
increased oxygen levels
become warmer
"blown away" by solar wind
become thicker
38
A light year is ....
the distance it takes light to travel in one year
the distance from the sun to the Earth
the time it takes for light to travel one parsec
The time it takes for light to travel one AU
39
Which planet is
not
known as a Gas Giant?
Venus
Saturn
Jupiter
Neptune
40
Neptune and Uranus has a blue appearance due to having __________ in its atmosphere.
Nitrogen
Carbon Dioxide
Methane
Ammonia
41
The dwarf planet, Pluto is composed of ....
solid rock
hydrogen and helium
frozen water
liquid water
42
What is found between Mars and Jupiter?
The Asteroid Belt
Saturn
Earth
Kuiper Belt
43
This planet rotates on its axis in a retrograde motion or clockwise direction.
Saturn
Mercury
Venus
Jupiter
44
The 4 planets closest to the sun are known as ...
rocky dwarfs
gas giants
terrestrial planets
ice giants
45
Why does Venus's night time temperature NOT vary much from its day time temperatures?
Presence of a very strong magnetic field
Presence of liquid surface water
because of the extreme tilt of the planet's axis
Greenhouse Effect due to dense CO2 atmosphere
46
Earth's axis has a ______ degree tilt.
0
23
90
3
47
This planet is the least dense of all planets due to its gaseous composition and small core.
Mars
Saturn
Mercury
Jupiter
48
As two objects get farther apart, the gravitational force between them ......
decreases
increases
stays the same
49
The process of forcing two hydrogen atoms to produce a helium atom and energy is known as....
plate tectonics
nuclear fusion
quantum mechanics
gravitaional force
50
Current evidence indicates that our solar system is __________ old?
10,000 years
~4.6 billion years
~ 13.5 billion years
500 million years
51
What does being a terrestrial planet mean?
composed of rock (solid surface)
Composition of gas
having a breathable atmosphere
having rings
52
These bodies consist mostly of frozen gases and have tails that always point away from the sun
dwarf planets
Meteorites
comets
asteroids
