Astronomy week 2 lessons Habitable conditions
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University of the Cumberlands *
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101
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Astronomy
Date
Dec 6, 2023
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docx
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Uploaded by j.smith1430
Habitable conditions
in Is there life in space?
1:
Earth is about 4.5 billion years old. The first micro-fossil evidence of life on Earth dates to
about 3.4 billion years ago. Scientists think that it takes millions of years for life to evolve.
Which star type is least likely to have a planet on which life could have evolved?
A-class star
2:
Explain your answer.
because class A stars are hotter than the others
3:
Which star type is the hottest?
A-type star
4:
If a planet's orbit is close to its star, what would happen to any water on the surface?
The water would evaporate.
5:
Explain your answer.
if the planet orbits close the surface will be very hot and heat will cause water to evaporate
6:
How certain are you about your claim based on your explanation?
(4)
7:
Explain what influenced your certainty rating.
because i know heat evaporates water so it make the most logical sense
8:
Why is the M-class star's zone of liquid water possibility so close to the star?
m class is the coolest stars so water is possible close to the star
9:
Our Sun is a G-class star. The Earth orbits the Sun within the zone of liquid water possibility.
A scientist finds an Earth-sized planet orbiting its K-class star at the same distance as the Earth
orbits the Sun. Is it likely that the newly-discovered planet has liquid water on its surface?
no
10:
Explain your answer.
k class is cooler than G class stars
11:
How certain are you about your claim based on your explanation?
(4)
12:
Explain what influenced your certainty rating.
By comparing the heat of the classes of stars helps determine if liquid water is possible
13:
Which star types are favorable to the development of life? Choose all that apply.
K-type star
G-type star
F-type star
14:
Which characteristics are favorable to habitability? Check all that apply.
rocky planet
medium planet (Earth-sized)
huge planet
an orbit entirely in the liquid water zone
15:
Scientists find an Earth-sized planet orbiting an F-class star, slightly outside of the zone in
which liquid water can exist on the surface. Is it possible that this planet can support living
things?
yes
16:
Explain your answer.
Yes it is possible because water could be under the surface and it could be possible for living things
17:
How certain are you about your claim based on your explanation?
(4)
18:
Explain what influenced your certainty rating.
water is vital for living things
19:
Which planet is most likely to have conditions that would be favorable to life?
Planet B
20:
Explain your answer.
two of the planets orbit in the zone of liquid water planet A is gaseous planet d and b are rocky and orbit a
blue and white star
21:
How certain are you about your claim based on your explanation?
(3)
22:
Explain what influenced your certainty rating.
knowing the different types of heat and star colors that indicate the possibility for liquid water
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