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WorksheetsFormation of Earth (review)
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
In general, planets that have a greater number of craters on their surface are:
a)
younger.
b)
bigger.
c)
older.
d)
more dense.
2.
Terrestrial planets are usually:
a)
closer to their star than gas giants.
b)
less dense than ice giants.
c)
larger than gas giants.
d)
older than ice giants.
3.
One major difference between the Earth and the Moon is:
a)
the Earth does not have an atmosphere.
b)
The Earth is much smaller than the Moon.
c)
The Moon is much older than the Earth.
d)
The Moon does not have plate tectonics.
4.
As you move further away from the center of the solar system:
a)
the planets get smaller.
b)
the planets get less dense.
c)
the planets get warmer.
d)
all of the above.
5.
Which of the following lists the types of planets in the correct order from least dense to most dense?
a)
terrestrial, gas giant, ice giant
b)
ice giant, terrestrial, gas giant
c)
gas giant, ice giant, terrestrial
d)
gas giant, terrestrial, ice giant
6.
Scientists are able to determine how the Earth formed by:
a)
radioactive dating of meteorites.
b)
analyzing craters on the Earth and Moon.
c)
studying the size an composition of other planets.
d)
all of the above.
7.
Earth does not have nearly as many craters as the Moon because:
a)
the Moon protected the Earth from many asteroid impacts.
b)
the Earth's magnetic field deflects incoming asteroids.
c)
many of the Earth's craters have eroded away.
d)
the Earth isn't as old as the Moon.
8.
The amount of time it takes for 50% of a sample of a radioactive element to decay is called its:
a)
decay rate.
b)
half-life.
c)
half-blood.
d)
lifespan.
9.
Gas giants are:
a)
almost always larger than terrestrial planets.
b)
usually habitable.
c)
much more dense than ice giants.
d)
all of the above.
10.
When an unstable element like uranium turns into a more stable element like thorium, it is called:
a)
plate tectonics.
b)
erosion.
c)
a supernova.
d)
radioactive decay.
11.
Erosion:
a)
can be caused by wind, water, or aliens.
b)
only occurs on planets that have an atmosphere.
c)
may cause planets to have more craters.
d)
all of the above.
12.
Based on current scientific evidence, how old is the Earth?
a)
6,000 years old
b)
460 million years old
c)
4.6 billion years old
d)
46 billion years old
13.
As the Moon gets older, its craters will:
a)
mostly remain the same.
b)
slowly get eroded away.
c)
get covered up due to plate tectonics.
d)
disappear because of radioactive decay.
14.
The amount of a radioactive element in a rock sample:
a)
decreases at a predictable rate.
b)
will never increase.
c)
can be used to find the absolute age of the rock.
d)
all of the above.
15.
The number of visible craters on Earth will probably decrease in the future for all of the following reasons except:
a)
human technology protects Earth from all meteor impacts.
b)
most meteors that hit Earth land in the ocean and don't leave craters.
c)
there are not as many meteor impacts today as there were when the Earth first formed.
d)
Earth processes like erosion and plate tectonics cover them up.
16.
Which of the following statements about density is false?
a)
The Earth is organized into layers with the least dense being at the top.
b)
When the Solar System formed, the heaviest materials were pulled close to the Sun.
c)
The density of planets increases as you move away from the Sun.
d)
The density of the Earth increases as you move towards the center.
17.
What percentage of a radioactive element would be left after 2 half-lives?
a)
80%
b)
50%
c)
25%
d)
10%
18.
If a rock sample starts out with 800 atoms of a radioactive element, how many atoms would be left after 3 half-lives?
a)
600
b)
200
c)
100
d)
50
19.
Which of the organisms in the picture is the oldest?
a)
Trilobite
b)
Ammonite
c)
Fish
d)
Dinosaur
20.
Earth scientists assume that the processes we see on Earth today have always worked the same way. This is called:
a)
Differentiation.
b)
Precambrian.
c)
Superposition.
d)
Uniformitarianism.
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