Uranus and Neptune:
What are the sizes, masses, and densities of these planets?
U:51,118km,8.6x10^25,1318kg/m3 N:49,528 km,1.024x10^26,1638 kg/m3
how do their structures differ from Jupiter and Saturn?
Uranus and Neptune both are made from H+HE but contai
A planet is detected via the Doppler technique. The velocity change of the star is a measure of
-. 3 .- the planet's mass and orbital distance.
the planet's mass and composition.
-. _ .- the planet's size and density.
the planet's orbital period an
What is astrometry?
- measuring distances to stars
searching for planets around stars
using metric units for distance (e.g. meters rather than light years)
- measuring the velocities of stars via the Doppler effect
-. measuring the positions of sta
Which planet search technique is currently best suited to ﬁnding Earth-like planets?
combining all the above
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Why aren't small asteroids spherical in shape?
Large asteroids were once molten and therefore became spherical, but small asteroids were never molten.
Small asteroids have odd shapes because they were all chipped off larger objects.
Why do jovian planets bulge around the equator, that is, have a "squashed" appearance?
Their internal heat sources exert a pressure against the sides of the planets.
3. Their rapid rotation flings the mass near the equator outward.
Their large syst
Earth is made mestl'yr at metals and melts. Where did this material eeme tram?
-:- ltwas prudueed inthe Big Barg.
ltwas made byeurEun.
- Z - It was created by ehemieal reastiens in interstellar spaee.
- It was prudueed by nuclear fusien in stars.
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What does the average density imply about Jupiters composition?
Jupiters average density is 1326 kg/m^3 and Earths average density is 5515kg/m^3 so this means that Jupiter is composed of gaseous/lightweight elements. Made mostly of
hydrogen and he
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Chapter 12 Question 7
How does the largest asteroid, Ceres, compare in size to other solar system
It is about the size of a large jovian m
Chapter 10 Question 21
Ultraviolet light is absorbed in the
none of the above
Chapter 10 Question 22
The ionosphere is a layer of ionized gas that is
within the trop
What percentage of the mass of the solar nebula consisted of elements other
than hydrogen and helium?
Chapter 8 Question 2
Where did the elements heavier than hydrogen and
How did Eratosthenes estimate the size of Earth in 240 B.C.?
We don't know how he did it since all his writings were destroyed.
by measuring the size of Earth's shadow on the Moon in a lunar eclipse
by observing the duration of a solar eclipse
Chapter 9 Question 8
The terrestrial planet cores contain mostly metal because
metals sank to the center during a time when the interiors were molten throughout.
radioactivity created metals in the core from the decay of uranium.