ASTR 101 Exam 3
Clouds are white because of dispersion
False
Like on earth, the sky on the moon is blue too.
False
Reading: All of Jupiter's surface rotates at a uniform rate.
False
Reading: Like the Moon, Mercury has a small iron core (relative to its size).
False
Reading: Mercury's has a nice, thick atmosphere.
False
Reading: The figure on the top of p. 91 in HTRTSS (caption="Mercury's perihelic advance....") shows Mercury's orbit always traces out the same elliptical path.
False
Reading: The term 'inferior planet' is meant to mean 'insignificant.'
False
Reading: We are sure Venus' volcanoes are still active.
False
The sky is blue because of dispersion
False
With global warming, a lot of nitrogen in the atmosphere traps IR light near the earth's surface
False
The original Nebula our solar system likel formed from was mostly made of
H and He
What region of the solar system is full of "space junk" that never formed into a planet?
Kuiper Belt
The frost line is between
Mars and Jupiter
Light travels at this many miles per second
hundreds of thousands
For a primary (nice and bright) rainbow, the blue light is always on the bottom
True
Reading: A 'transit' is when Venus moves directly between the line-of-sight between the Earth and Sun.
True
Reading: In in 1700s, a transit of Venus helped to establish the size of the solar system.
True
Reading: Mercury's shows phases, just like the Moon.
True
Reading: Sometimes a day on Mercury would have two sunrises.
True
Reading: Venus has many, many volcanoes.
True
Reading: Venus is covered with clouds, that are there all the time.
True
Reading: Venus is the 2nd brightest object in the sky after the Sun.
True
When white light emerges from a single water drop in a rainbow, the red light is on the bottom and the blue light is on the top.
True
Nitrogen and Oxygen molecules tend to wriggle a lot when they are hit by
blue light
You see a star and the sun directly overhead. As you continue to rotate on the earth, which will appear overhead first, once again about a day later?
both at the same time
What is an outward force that exists only while spinning?
centrifugal force
In the gravity equation, the denominator is
d squared
A "nebula" is
dust
Clouds are white because of dispersion
false
Reading: According to the fig. on p. 188 of HTRTSS, the Earth was closer to Jupiter in November.
false
Reading: Mars has a very thick atmosphere.
false
Reading: Mercury's year is longer than the Earth's.
false
Reading: Missions to Mars have a very high success rate.
false
Reading: There is no evidence that water ever flowed on Mars.
false
Reading: There's no chance of finding life on Europa.
false
Reading: Venus does not show phases, like our Moon and Mercury.
false
Reading: Venus has excellent solar wind protection.
false
Stars would twinkle, if observed from the surface of the moon.
false
The centrifugal force always pulls things toward the center of a circle
false
The index of refraction is constant over all wavelengths.
false
The same face of Mercury always faces the sun.
false
The sky is blue because of dispersion
false
When an excited atom releases a photon, the outgoing photon will always go in the same direction.
false
In the Nebular Hypothesis, the originating heat that led to the star forming came from
friction
In the nebular hypothesis, the original heat that led to the star forming came from
friction
IR-light is most associated with
heat
What event happened about 4.5 billion years ago and resulted in the intense cratering of Mercury?
heavy bombardment
The Mariner spacecraft went to Mercury and was able to finally determine Mercury's
mass
Light at 550 nm enters water of glass and has a n=1.33. What possible value of n would be possible for blue light?
1.34
The Solar day is
about 4 minutes longer than the Sidereal day.
The Sidereal day is
about 4 minutes shorter than the Solar day.
What makes an object spin faster when its mass is closer to the center?
angular momentum
The water drops that form rainbows are relatively
large
Mercury is difficult to study because of its
location
The star that comes from a cloud of dust usually forms
on the axis of spinning cloud of dust
The hard part about fusion is
overcoming the repulsion of two H-atoms
You see two "dots of light" in the sky. One is twinkling and one is not. The one not twinkling is likely a
planet
This sits at the center of a simple atom
proton
A sidereal day is ___ than a solar day.
shorter
Rocky planets formed closer to the sun do to the
solar wind
You are on a stool spinning around. When you pull your arms inward you
speed up
Reading: Hmmm...so it appears as if all of the excitement about life on Mars was due to a translation issue between English and Italian?
yes
Even in the presence of the centrifugal force, gravity is ALWAYS an attractive force
true
Reading: An 'inferior planet' lies between the Earth and Sun.
true
Reading: It appears as if Io has quite a few volcanoes.
true
Reading: Mars has polar ice caps.
true
Reading: Mars' day is about as long as Earth's.
true
Reading: Mars' moons are likely captured asteroids.
true
Reading: The great red spot on Jupiter is a vast hurricane.
true
Reading: Venus has a 'retrograde rotation.'
true
Reading: Venus is a completely dry planet.
true
Reading: Venus rotates very slowly.
true
Reading: Venus' atmosphere is almost all CO2.
true
Reading: With Jupiter, Romer worked on some of the first measurements of the speed of light.
true
Spinning is a central theme to the Nebular Hypothesis
true
With the Doppler Effect, when the emitter is going toward the receiver, the wavelengths get smaller.
true
For Mercury, how is the solar day related to the orbital period?
twice as long
The rotational speed of a collapsing gas
will always increase