Download Quiz4 - UNLV Physics

Which of the following correctly describes the meaning of albedo?
A) The lower the albedo, the more light the surface reflects, and the less
it absorbs.
B) The higher the albedo, the more light the surface reflects, and the less
it absorbs.
C) The higher the albedo, the more light the surface absorbs.
D) The higher the albedo, the more light the surface emits.
E) The higher the albedo, the more light the atmosphere absorbs.
Answer: B
Which of the following worlds has the most substantial atmosphere?
A) Mercury
B) Venus
C) the Moon
D) Mars
E) Earth
Answer: B
Which of the following planets has the least substantial atmosphere?
A) Venus
B) Earth
C) Mars
D) Neptune
E) Mercury
Answer: E
Which of the following worlds has the greatest difference in
temperature between its "no atmosphere" temperature and its actual
temperature?
A) Mercury
B) Venus
C) Earth
D) the Moon
E) Mars
Answer: B
Why does Venus have such a great difference in temperature between its
"no atmosphere" temperature and its actual temperature?
A) It has a slow rotation.
B) It is so close to the Sun.
C) It has a large amount of greenhouse gases in its atmosphere.
D) It has a high level of volcanic activity.
E) It has no cooling effects from oceans.
Answer: C
Why do jovian planets bulge around the equator, that is, have a
"squashed" appearance?
A) They are much more massive than the terrestrial planets.
B) Their large systems of moons and rings gravitationally attract the mass
around the equator more.
C) Their rapid rotation flings the mass near the equator outward.
D) Their internal heat sources exert a pressure against the sides of the
planets.
E) all of the above
Answer: C
How much energy does Jupiter emit compared with how much it receives
from the Sun?
A) It emits
B) It emits
C) It emits
D) It emits
E) It emits
Answer: B
10 times as much.
twice as much.
half as much.
10 percent as much.
1 percent as much.
How many more times is the atmospheric pressure in Jupiter's core
greater than the atmospheric pressure at Earth's surface?
A) 10 thousand
B) 100 thousand
C) 1 million
D) 10 million
E) 100 million
Answer: E
How do astronomers think Jupiter generates its internal heat?
A) radioactive decay
B) internal friction due to its high rotation rate
C) chemical processes
D) nuclear fusion in the core
E) by contracting, changing gravitational potential energy into thermal energy
Answer: E
How does Jupiter's core compare to Earth's?
A) It is the same size and mass.
B) It is about 10 times larger both in size and mass.
C) It is about 10 times larger in size and the same mass.
D) It is about the same size but is 10 times more massive.
E) Jupiter doesn't have a core!it is made entirely from hydrogen and helium.
Answer: D
Which of the following statements about comets and asteroids is true?
A) Only asteroids collide with Earth.
B) Comets are balls of ice and dust.
C) Most of the trillions of comets in our solar system have tails.
D) All asteroids lie in the asteroid belt between Mars and Jupiter.
E) There are about 1 million known asteroids in the solar system.
Answer: B
What do
A) Most
B) They
C) They
D) They
E) They
Answer:
asteroids and comets have in common?
are unchanged since their formation in the solar nebula.
have similar densities.
have similar orbital radii.
have a similar range of orbital inclinations.
have nothing in common with each other.
A
A rocky leftover planetesimal orbiting the Sun is
A) a comet.
B) a meteor.
C) an asteroid.
D) a meteorite.
E) possibly any of the above
Answer: C
An icy leftover planetesimal orbiting the Sun is
A) a comet.
B) a meteor.
C) an asteroid.
D) a meteorite.
E) possibly any of the above
Answer: A
Why do asteroids and comets differ in composition?
A) Asteroids formed inside the frost line, while comets formed outside.
B) Asteroids and comets formed at different times.
C) Comets formed from the jovian nebula, while asteroids did not.
D) Comets are much larger than asteroids.
E) Asteroids are much larger than comets.
Answer:
A
What is astrometry?
A) measuring distances to stars
B) searching for planets around stars
C) measuring the positions of stars on the sky
D) measuring the velocities of stars via the Doppler effect
E) using metric units for distance (e.g. meters rather than light years)
Answer: C
By itself, the Doppler technique provides a measure of a planet's
A) minimum mass.
B) orbital radius.
C) orbital eccentricity.
D) all of the above
Answer: D
Planets detected via the Doppler technique have been mostly
A) Earth-mass, in Earth-like orbits.
B) Jupiter-mass, in Jupiter-like orbits.
C) Jupiter-mass, in very close orbits.
D) Earth-mass, in very close orbits.
E) a wide range of masses, in edge-on orbits.
Answer: C
Current techniques can measure stellar motion to less than
A) walking speed.
B) running speed.
C) freeway speed.
D) cruising speed of an airplane.
E) orbital speed of Jupiter.
Answer: A
A planet's density can be measured by combining
A) Doppler and astrometric observations.
B) Doppler and transit observations.
C) spectral observations of the planet's atmosphere.
D) any method that measures the gravitational tug of the planet on the star.
E) direct imaging from the new generation of space telescopes.
Answer: B
The composition of a planet can be determined by
A) the Doppler technique.
B) astrometric measurements.
C) transit observations.
D) spectra.
E) all of the above
Answer: D
The size and shape of a planet's orbit can be determined by
A) the Doppler technique.
B) transit observations.
C) spectral measurements.
D) knowing the planet's mass by any technique and applying Newton's
version of Kepler's third law.
Answer: A
The astrometric technique of planet detection works best for
A) large planets around nearby stars.
B) massive planets around nearby stars.
C) large planets around distant stars.
D) massive planets around distant stars.
E) planets in edge-on orbits.
Answer: B
Test 3 covers Ch 10-13
Chapter 10 Planetary Atmospheres
What are the atmospheres around the various planets
Greeenhouse Effect
Earth's is unique
Mars, Venus and Earth probably started the same, What happend?
weather
Chapter 11 Jovian Planets
Jupiter and Saturn
Uranus and Neptune
What causes excess heat
weather and storms
Jovian planets moons
Chapter 12 Astroids, Comets
Astroids
Comets
Where were they formed, where are they now
Meteor, Meteorite,....
CHapter 13 Other Planets.
How do we find them? (Doppler, Astronometry, Transit, Grav. Lens, ...)
What are the strengths of each method?
What kind of systems have we found?
How do we need to modify our Nebular Theory?