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AST 111 Exam Study Questions (Latest Update) with Verified Answers
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AST 111 Exam Study Questions (Latest Update) with Verified Answers
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AST 111 Exam Study Questions (LatestUpdate) with Verified Answers
Most people are familiar with the rise and fall of ocean tides. Do tides also affect land? -
✔✔Yes, though land rises and falls by a much smaller amount than the oceans.
Any particular location on Earth experiences __________. - ✔✔two high tides and two low
tides each day
One tidal bulge faces toward the Moon because that is where the gravitational attraction
between Earth and the Moon is strongest. Which of the following best explains why there is
also a second tidal bulge? - ✔✔The second tidal bulge arises because gravity weakens with
distance, essentially stretching Earth along the Earth-Moon line.
As you watch the video, notice that the size of the tidal bulges varies with the Moon's phase,
which depends on its orbital position relative to the Sun. Which of the following statement(s)
accurately describe(s) this variation? - ✔✔-High tides are highest at both full moon and new
moon.
-Low tides are lowest at both full moon and new moon.
You have found that tides on Earth are determined primarily by the position of the Moon, with
the Sun playing only a secondary role. Why does the Moon play a greater role in causing tides
than the Sun? - ✔✔-because the gravitational attraction between Earth and the Moon varies
more across Earth than does the gravitational attraction between Earth and the Sun
Assume you have completed the two trials chosen in Part A. Which of the following possible
outcomes from the trials would support Newton's theory of gravity? Neglect effects of air
resistance. - ✔✔Both balls fall to the ground in the same amount of time.
If you actually performed and compared the two trials chosen in Part C, you would find that,
while the basketball and marble would hit the ground at almost the same time, it would not
,quite be exact: The basketball would take slightly longer to fall to the ground than the marble.
Why? - ✔✔Because air resistance has a greater effect on the larger ball.
Einstein's theory, like Newton's, predicts that, in the absence of air resistance, all objects should
fall at the same rate regardless of their masses. Consider the following hypothetical
experimental results. Which one would indicate a failure of Einstein's theory? - ✔✔Scientists
dropping balls on the Moon find that balls of different mass fall at slightly different rates.
According to the law of universal gravitation, what would happen to Earth if the Sun were
somehow replaced by a black hole of the same mass? - ✔✔Earth's orbit would not change.
If Earth were twice as far from the Sun, the force of gravity attracting Earth to the Sun would be
- ✔✔one-quarter as strong.
If the Moon were closer to Earth, high tides would - ✔✔Be higher than they are now
Consider the statement "There's no gravity in space." This statement is: - ✔✔Completely
False.
Electromagnetic Spectrum - ✔✔All light has the same speed.
Compared to red light, blue light has higher frequency and - ✔✔higher energy and shorter
wavelength.
Radio waves are: - ✔✔a form of light.
Which of the following are forms of light (electromagnetic radiation)?
Select all that apply. - ✔✔radio waves
ultraviolet
, gamma rays
microwaves
visible light
infrared
X rays
Red light has a _____ wavelength and a _____ frequency than does blue light. - ✔✔longer,
lower
X ray photons have a _____ wavelength, _____ frequency, and _____ energy than do ultraviolet
photons. - ✔✔Shorter, higher, higher
If you have a telescope that is observing light with wavelengths of a few meters, you are
observing __________. - ✔✔radio waves.
Suppose that you had "X-ray vision" that allowed you to see X rays. What would you notice
when you looked at a friend standing near you that you could not notice with your visible light
vision alone? - ✔✔nothing
Why is a sunflower yellow? - ✔✔It reflects yellow light.
Rank these colors of visible light from left to right based on the altitude in the atmosphere
where they are completely absorbed, from highest to lowest (Earth's surface). If two (or more)
of the choices reach the surface, rank them as equal by dragging one on top of the other(s). -
✔✔all wavelengths of visible light reach Earth's surface, which is why we can see all colors
and why visible-light telescopes work fine on the ground.
Thermal radiation gets its name because __________. - ✔✔its spectrum depends on the
temperature of the object emitting it
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