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Solar System 6-8th Grade Flashcards | StudBud
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Solar System 6-8th Grade
Solar System 6-8th Grade
32 terms
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sun and solar system, review for 8th grade state test
Flashcards
32 cards
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Practice quiz
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Questions
32
Answers
1
How many of Earth's days does it take for Earth's moon to
rotate
once?
about 14
about 12
about 28
about 1
2
What do scientists call the time it takes for a planet to complete one orbit around the Sun?
day
year
ellipse
lunar cycle
3
Compared to other stars, the sun's surface temperature is ...
hotter than all the other stars
medium temperature
cooler than most other stars
cooler than 20% of stars
4
Which of these planets is closest to the Sun?
Venus
Mars
Earth
Jupiter
5
Which of these planets has the longest revolution around the sun? (longest year)
Earth
Saturn
Jupiter
Mars
6
Compared to other stars, the sun's luminosity is ...
brighter than most stars
brighter than many stars
medium brightness
dimmer than most stars
7
The sun contains what percentage of the
mass
in the solar system?
90%
70%
99%
80%
8
What two gases make up most of Earth's atmosphere?
Carbon dioxide and Oxygen
Hydrogen and Carbon
Carbon and Water Vapor
Nitrogen and Oxygen
9
Which planet is called "Earth's evil twin" because of similar size, but poison atmosphere?
Mercury
Mars
Venus
Neptune
10
Which planet used to be the 9th planet but is now a "dwarf planet?"
Mars
Neptune
Pluto
Mercury
11
How far is our sun from the center of the Milky Way (our home galaxy)?
near the center
1/2 way out from the center
2/3 of the way out from center
far out on the edge
12
How many of Earth's days does it take for Earth's moon to
revolve
once?
about 28
about 1
about 12
about 14
13
Which word does NOT describe the Sun?
star
large
planet
radiant
14
Which of these is NOT in orbit around our sun?
stars
meteors
comets
planets
15
Compared to other stars, the sun's size is ...
somewhat small
very small
medium size
very large
16
The moon's orbit causes which of the following changes on Earth?
night and day
tides and phases
seasons and tides
eclipses and erosion
17
Which planet is famous for its ring system?
Saturn
Uranus
Mars
Jupiter
18
What is the fourth planet from the sun?
Earth
Venus
Mercury
Mars
19
What is found between the inner planets and the outer planets?
lost helium balloons
Moon belt
Kuiper belt
Asteroid belt
20
Which planets have rocky composition?
Mercury, Mars, Jupiter, Neptune
Mercury, Mars, Saturn, Uranus
Mercury, Venus, Earth, Mars
Mars, Earth, Jupiter, Saturn
21
Complete the following -- layers : Earth as _____ : Sun
gases
solid surface
Milky Way galaxy
zero gravity
22
How long does it take light from the closest star to reach Earth?
4.2 years
149 minutes
8 minutes
300,000 seconds
23
Which process does the sun use to create all of its energy?
Nuclear fission, where helium is changed into hydrogen.
Nuclear fission, where nitrogen is changed into oxygen.
Nuclear fusion, in which it is burning like fire.
Nuclear fusion, where hydrogen is changed into helium.
24
Which shape best shows the orbit of Earth around the Sun?
triangle
square
circle
rhombus
25
What force keeps planets in orbit around the Sun?
gravity
inertia
air pressure
magnetism
26
Right now Earth's sun is about halfway through its life. It should last another ...
5 billion years
5 million years
10 billion years
10 million years
27
Which planet has the most moons (more than 60)?
Uranus
Saturn
Mars
Jupiter
28
The sun gives Earth
much
more energy than all the other stars because it is ...
closer than the other stars
larger than the other stars
more luminous than the other stars
hotter than the other stars
29
Which planets have fluid (frozen gases) composition?
Mercury, Mars, Jupiter, Neptune
Mercury, Venus, Earth, Mars
Jupiter, Saturn, Neptune, Uranus
Mercury, Mars, Saturn, Uranus
30
Why does the moon appear bright, even though it does not make light?
It has many volcanoes.
It reflects light from the Sun.
It reflects light from planets.
It absorbs light from Earth.
31
How many days does it take for Earth to
revolve
once?
365
1
24
28
32
How many days does it take for Earth to
rotate
once?
1
365
28
24
