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WorksheetsOur world, other worlds
Total questions: 15
Worksheet time: 8mins
Mars has two moons named Phobos and Deimos, two Greek words meaning __________ and ___________.
Blood and Gore
Sword and Shield
Wrath and Sorrow
Panic and Fear
Mars once had running water that carved canyons and other features into its surface. What happened to the water?
Mars is too far from the sun and cold to sustain water.
Marsquakes caused all the water to seep into cracks in the crust.
An asteroid clobbered Mars and vaporized the water. .
Most of Mars’s water was lost to space or remains frozen in soil and ice caps.
Earth isn't the only body in the solar system with rivers and lakes. Which other world has similar features?
Mercury (liquid lead)
Saturn's moon Titan (liquid methane)
Saturn (liquid oxygen)
Neptune's moon Triton (liquid ammonia)
Earth and Venus are rocky planets of about the same size, but Earth's average surface temperature is about 59° F, while Venus' is 1,350° F, hot enough to melt lead or aluminum. Why the difference?
Venus has a stronger greenhouse effect than Earth.
Venus is made of denser rock than Earth.
Earth is more geologically active than Venus.
Ice caps and oceans on Earth absorb energy from the atmosphere.
Which circumstances could end life on Earth?
The sun continues to heat up. In a billion years, Earth gets too hot, oceans evaporate, water vapor is “cooked out” of Earth’s crust and all life dies out.
A massive asteroid smashes into Earth, vaporizing swaths of the surface and permanently changing the atmosphere.
Both of the above
None of the above.
Earth's magnetic field shields us from solar wind and helps hold onto the atmosphere and water. To what do we owe this invisible protector?
The aurora borealis
Plate techtonics
Earth's circulating liquid metal core
All of the above
Earth is the only body in the solar system thought to have oceans of liquid water.
True
False
Earth is smack in the middle of the "habitable zone" around the sun, where temperatures are right for liquid water to exist.
True
False
Exoplanets that have a lot of volcanic activity and exist in systems with many asteroids are bad prospects for looking for extraterrestrial life.
True
False
Small Earth-sized planets are common in the galaxy.
True
False
What percent of atomic matter in the Universe is responsible for creating objects more complex than stars?
98%
74%
2%
42%
What process enabled the formation of our inner rocky planets, including our planet Earth?
The Big Bang
Supernova
Collision
Accretion
The formation of the Earth would have been impossible without which of the following?
Bacteria
Plate tectonics
Earlier stars
Black holes
Neptune has its own internal energy source. This gas giant planet produces about _________ as much energy as it receives from the Sun.
half
twice
four times
0.00004%
A day on Mercury is about _____________ long
88 Earth days
59 Earth days
10 hours
248.2 days
