Venus' lack of magnetic field means that:
A) there is no lightning on Venus.
B) the surface of Venus has no protection from the Sun's radiation.
C) it doesn't have a liquid metallic core.
D) Venus' upper atmosphere is permanently ionized.
E) there are constant aurorae everywhere on Venus.
Question 2Which of the following best describes the internal layering of Jupiter, from the center outward?
A) core of rock, metal, and hydrogen compounds; thick layer of metallic hydrogen; layer of liquid hydrogen; layer of gaseous hydrogen; cloud layer
B) core of rock and metal; mantle of lower density rock; upper layer of gaseous hydrogen; cloud layer
C) solid rock core; layer of solid metallic hydrogen; layer of pure liquid hydrogen; cloud layer
D) liquid core of hydrogen compounds; liquid hydrogen layer; metallic hydrogen layer; gaseous hydrogen layer; cloud layer
Question 3In our vicinity, the galactic disk is about 100 times wider than it is thick.
Indicate whether the statement is true or false
Question 4We look toward a cool star. How can we determine that there is an interstellar dust cloud between us and the star?
What will be an ideal response?
Question 5Discuss the role that methane plays in the appearances of Neptune and Uranus.
What will be an ideal response?
Question 6The total amount of power (in watts, for example) that a star radiates into space is called its
A) apparent brightness.
B) absolute magnitude.
C) luminosity.
D) flux.
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