Astro 1500 Exam 1 Review
Authored by Amanda Weinstein
Physics
University
NGSS covered
Used 2+ times
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30 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The sun is 8 light-minutes away from us. If the sun were to suddenly go dark, how long would it take for us to notice?
We would immediately notice
15 seconds
8 minutes
1-2 years
Answer explanation
The sun is 8 light minutes away, so it would take 8 minutes for the light (or lack of light) to reach us.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why can't we make out stars from other galaxies without using advanced machinery like telescopes?
They are redshifted out of the visible range
They're a bit shy
We can actually see individual stars from other galaxies
They are too far away, making them either too dim, or too close together to see
Answer explanation
Our eyes do not have the light gathering or angular resolution of a good telescope
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The ISS orbits because...
It floats on top of the clouds
It's moving sideways quickly enough that it 'misses' the ground
Thrusters onboard constantly boost it upwards
It is completely outside of the earth's gravitational influence
Answer explanation
All an orbit is, is throwing something sideways with enough velocity that when it would hit the ground, it has moved enough that the ground bends away from it (because earth is a sphere).
Tags
NGSS.HS-ESS1-4
NGSS.HS-PS2-4
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The luminosity of a star depends on (among other things) ...
It's temperature
How far away it is from us
How many planets it has
Whether it's moving towards or away from us
Answer explanation
Luminosity depends on only the temperature and radius of the star. Both properties intrinsic to the star.
Tags
NGSS.HS-ESS1-1
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A star's brightness depends on (among other things) ...
It's metallicity (how much metal is in the star)
How far away it is from us
How many planets it has
Whether it's moving towards or away from us
Answer explanation
Brightness, unlike luminosity depends on how far away the star is from us
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In general, red stars are ____ than blue stars.
Hotter
Colder
Closer
Farther
Answer explanation
Color can be an allegory for temperature. Blue stars are hotter than red stars.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Jupiter orbits at a distance of roughly 5 AU from the sun, how long is a year on Jupiter (in earth years)?
1 earth year
3 earth years
5 earth years
11 earth years
Answer explanation
Show on board
Tags
NGSS.HS-ESS1-4
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