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Astronomy
Test Description: Solar system
Instructions: Answer all questions to get your test result.
1) Our solar system formed about 4.6 billion years ago when
A
stars collided with one another.
B
Jupiter formed the largest planet.
C
a cloud of interstellar dust and gas began to condense
D
a large planet broke into many pieces.
2) One characteristic all outer planets are similar is
A
presence of gas and ice.
B
solid surface.
C
mass is less.
D
evidence of volcanic activity.
3) What evidence proved that the solar system is approximately 4.6 billion years old?
A
surface of other planets
B
age of rocks from Earth and moon were determined
C
atmosphere of planets
D
minerals found on the surface of Earth
4) The solar system formed from
A
cloud of gas and dust
B
stars explosion
C
gravity
D
a huge planet that broken into small pieces
5) How was early Earth different from Earth today?
A
There were more volcanic eruptions.
B
It was foggier.
C
It rained more.
D
The Sun was dimmer.
6) The Sun is powered by
A
fission of helium to form hydrogen.
B
fusion of helium to form hydrogen.
C
fission of hydrogen to form helium.
D
fusion of hydrogen to form helium.
7) Which evidence is often used to suggest that some mass extinction of life on Earth were caused by asteroid impacts?
A
consistent volcanic eruptions
B
unusually high amounts of iridium found in clay layers
C
High amounts of heavy elements in rocks
D
climate change
8) Early telescopes showed stars as only points of light, while the planets appeared to be much larger, providing evidence that stars must
A
travel in elliptical orbits like planets.
B
be much farther from Earth than planets.
C
reflect much more light than planets.
D
be more plentiful in our solar system than planets.
9) Most of the craters left by asteroid impacts on Earth have disappeared because of
A
erosion.
B
human activity.
C
Earth's gravity
D
plate tectonics.
10) Which planet was formed from light gases of the outer solar nebula?
A
Mars
B
Mercury
C
Jupiter
D
Venus
*select an answer for all questions
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