EAPS 105: HW & QUIZ 7
Which objects have the greatest escape velocity? - Correct Answers -b. Giant planets
7.2. In Wikipedia, look up "Primary Atmosphere" and answer this question: A primary
atmosphere is an atmosphere of a planet that forms by accretion of hydrogen and
helium from the solar nebula. The giant planets still have their primary atmospheres, but
the terrestrial planets lost theirs. Which factors influenced why the terrestrial planets lost
their primary atmospheres? - Correct Answers -a. Surface temperatures
b. Mass of the atoms
c. Escape velocity
d. All the above
Which of the following describes characteristics of Venus' atmosphere? - Correct
Answers -a. It is composed primarily of carbon dioxide and is much denser and hotter
than that of Earth.
The Great Oxidation Event is a period in time on the Earth from 2.0-2.5 billion years ago
when our atmosphere first experienced a significant rise in oxygen. What is inferred to
have been the cause of this event? - Correct Answers -c. The emergence of
cyanobacteria (bacteria that obtain energy via photosynthesis)
Which of the following statements about Martian dust devils is true? - Correct Answers -
a. They can be many times larger than dust devils found on Earth.
b. They can be powerful enough to threaten rovers.
c. They can help clean dust off of rovers.
d. All the above
Which statement best characterizes water on the surface of Mars? - Correct Answers -
a. Billions of years ago there were lakes and rivers on the surface of Mars, but none
exist today.
Why is it important to know how long Mars had water on its surface? - Correct Answers
-b. Because the evolution of life takes time.
What is the primary cause of Earth's seasons? - Correct Answers -a. Its tilted orbit
7.6. In Wikipedia, look up "Mars", read the intro and then scroll down to "hydrology", and
answer this question: In general, why can liquid water not exist on the surface of Mars
today? - Correct Answers -b. The atmospheric pressure is too low.
Which objects have the greatest escape velocity? - Correct Answers -b. Giant planets
7.2. In Wikipedia, look up "Primary Atmosphere" and answer this question: A primary
atmosphere is an atmosphere of a planet that forms by accretion of hydrogen and
helium from the solar nebula. The giant planets still have their primary atmospheres, but
the terrestrial planets lost theirs. Which factors influenced why the terrestrial planets lost
their primary atmospheres? - Correct Answers -a. Surface temperatures
b. Mass of the atoms
c. Escape velocity
d. All the above
Which of the following describes characteristics of Venus' atmosphere? - Correct
Answers -a. It is composed primarily of carbon dioxide and is much denser and hotter
than that of Earth.
The Great Oxidation Event is a period in time on the Earth from 2.0-2.5 billion years ago
when our atmosphere first experienced a significant rise in oxygen. What is inferred to
have been the cause of this event? - Correct Answers -c. The emergence of
cyanobacteria (bacteria that obtain energy via photosynthesis)
Which of the following statements about Martian dust devils is true? - Correct Answers -
a. They can be many times larger than dust devils found on Earth.
b. They can be powerful enough to threaten rovers.
c. They can help clean dust off of rovers.
d. All the above
Which statement best characterizes water on the surface of Mars? - Correct Answers -
a. Billions of years ago there were lakes and rivers on the surface of Mars, but none
exist today.
Why is it important to know how long Mars had water on its surface? - Correct Answers
-b. Because the evolution of life takes time.
What is the primary cause of Earth's seasons? - Correct Answers -a. Its tilted orbit
7.6. In Wikipedia, look up "Mars", read the intro and then scroll down to "hydrology", and
answer this question: In general, why can liquid water not exist on the surface of Mars
today? - Correct Answers -b. The atmospheric pressure is too low.
