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Chapter 7, 8, 9, 10 Quiz Questions
Terms in this set (34)
Where is most of the mass in the Solar System located?
Strong evidence of past liquid water on the surface
Mostly hydrogen & helium
Jupiter and Saturn
Mostly methane, ammonia & water
Uranus and Neptune
Order the layers of a Terrestrial planet from most dense to least dense.
1. Inner core
2. Outer core
How do we know that the lunar highlands are an older surface than the lunar maria?
The highlands have more craters per square kilometer
Iron-60 is formed during supernovae (exploding stars). It decays into Cobalt-60 with a half-life of 2.6 million years. Suppose astronomers look at a supernova remnant and find that 68% of the Iron-60 has decayed. How many years ago did the star explode?
Give your answer in scientific notation (for example, 2,300,000 would be 2.3e6). Round your answer to two significant digits. You can neglect the finite speed of light.
Hint: If 68% of the Iron has decayed, what percent still remains? How is that percentage expressed as a fraction?
4.3E6 ; 4%
How was our solar system formed?
From the gravitational collapse of the solar nebula
Lowest layer, where humans live and where most weather takes place
Contains the ozone layer, which protects us from the Sun's UV light
Where meteors burn up
Ionized by the Sun's radiation
Which gas, emitted into the atmosphere by human activity, is responsible for the ongoing rise in Earth's average global temperature?
Why do tectonic plates move?
Convection currents in the mantle
When two tectonic plates press together, what is the result?
Tiny bits of rock and organisms cemented together
Chemically altered by heat and pressure
Where on Earth are most volcanoes found?
At tectonic plate boundaries
Day-to-day atmospheric activity
Long-term trends in atmospheric activity
What shields the Earth from the solar wind?
its magnetic field
Why does the Moon have more craters than Earth?
The Moon has no atmosphere and became geologically inactive long ago
Which of the following best describes the conditions on the surface of Venus?
Very hot with high pressure
Which statement best describes the presence of water on the Moon's surface.
There is no liquid water but there is ice in some craters
According to the prevailing hypothesis, what is the Moon's origin?
A Mars -sized object smashed into Earth, causing parts of Earth's mantle to splatter into orbit. The orbiting debris coalesced due to gravity and became the Moon
Which of the following best describes the atmosphere of Mars?
Very thin, mostly carbon dioxide
If Mars had liquid water rivers in the past, why doesn't it have them today?
There isn't enough atmospheric pressure for liquid water to be stable
Why can't oceans exist on Venus?
Venus is too hot due to a runaway greenhouse effect
Why is Venus's surface so hard to study?
Venus's thick atmosphere makes its surface difficult to see
In what forms does water exist on Mars today?
Ice on the surface, lakes underground, ice underground
What evidence is there for past liquid water on Mars?
Dry river beds, Minerals that form underwater, Rounded pebbles
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