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Solar System
Test Description: 6th grade Science
Instructions: Answer all questions to get your test result.
1) Why is Venus called Earth's twin?
A
Because of its similar atmosphere.
B
Because of its similar size.
C
Because life also existed there at one time.
D
Because of its similar temperature.
2) What characteristic do all of the inner planets have in common that the outer planets don't exhibit?
A
They have the same period of revolution.
B
They orbit elliptically.
C
They are the same size.
D
They are smaller and have rocky surfaces.
3) The high temperature of Venus's surface is due to
A
the high winds
B
the dense atmosphere
C
liquid water on its surface
D
its rings
4) It is difficult for astronomers to study Mercury because
A
it is so close to the sun
B
it is made of mostly gas
C
its atmosphere is so thick
D
it is so large compared to the other planets
5) Which of the following are in our solar system?
A
Sun, planets, moons, asteroids, comets
B
Sun, planets, other stars
C
Sun, planets
D
Sun, planets, moons, asteroids, comets, galaxies
6) When our solar system was forming, what force caused the particles to clump together?
A
inertia
B
gravity
C
nuclear fusion
D
explosions
7) The Great Red Spot is
A
a storm on Saturn
B
a volcano on Mars
C
a storm on Jupiter
D
a meteor that fell to Earth
8) Which of the following is true about Mars?
A
Mars has ice on its south pole.
B
Mars is hot.
C
Mars is an outer planet.
D
Mars is blue from its iron-rich soil.
9) What did Galileo observe in his telescope?
A
Mars rotating backwards
B
the four largest moons of Jupiter
C
the Sun orbiting the Earth
D
the elliptical orbits of the planets
10) What is the difference between asteroids and comets?
A
Comets are made of frozen ice and dust, while asteroids are made of rock and sometimes metal.
B
Comets orbit the sun, while asteroids orbit Earth.
C
There is no difference between the two.
D
Comets are found outside the solar system, while asteroids are found between the inner and outer planets.
11) Which of the following best describes a meteor?
A
A meteor is a moon of Jupiter that has fallen out of orbit.
B
A meteor is a falling star.
C
A meteor is a piece of broken rock that falls through Earth's atmosphere.
D
A meteor is a chunk of the Moon that astronauts have brought back to Earth.
12) Gravity on the Moon is less than on Earth because
A
the Moon has less mass
B
there is no oxygen on the Moon
C
of the lower temperatures
D
there is no water on the Moon
*select an answer for all questions
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