Astronomy

1.	Quiz M7-1
	The Sun will get brighter in the next 4 to 5 billion years. Student Response Value Correct Answer True 100% True Score: 5/5
2.	Quiz M7-2
	Evolution of a star off the main sequence is caused by the loss of mass from hydrogen fusion by the star while a main sequence star. Student Response Value Correct Answer False 100% False Score: 5/5
3.	Quiz M7-3
	The shell ejection in making a planetary nebula is spherical and symmetrical in all cases. Student Response Value Correct Answer False 100% False Score: 5/5
4.	Quiz M7-4
	A star (no matter what its mass) spends most of its life:   Student Response Value Correct Answer Feedback 1. as a protostar.      2. as a main sequence star. 100%      3. as a planetary nebula.     4. as a red giant or supergiant.     5. as a T Tauri variable star.     Score: 5/5
5.	Quiz M7-5
	What spectral type of star that is still around formed longest ago?   Student Response Value Correct Answer Feedback 1. F     2. G     3. A     4. O      5. M 100%      Score: 5/5
6.	Quiz M7-6
	Which of the following elements contained in your body is NOT formed in the cores of stars during thermonuclear fusion?   Student Response Value Correct Answer Feedback  1. hydrogen 100%      2. carbon     3. aluminum     4. calcium     5. iron     Score: 5/5
7.	Quiz M7-7
	There is no helium flash for a high mass star; for them, it is just one more step toward the heaviest element formation. Student Response Value Correct Answer True 100% True Score: 5/5
8.	Quiz M7-8
	A star cluster of age 100 million years contains no type O stars. Student Response Value Correct Answer True 100% True Score: 5/5
9.	Quiz M7-9
	For binary star systems where the stars are separated by more than 1000 stellar radii, mass transfer is not an issue. Student Response Value Correct Answer False 0% True Score: 0/5
10.	Quiz M7-10
	The age of a star cluster can be determined by the luminosity of the main sequence turnoff into the giant stage. Student Response Value Correct Answer True 100% True Score: 5/5
11.	Quiz M7-11
	At which stage in a sun-like star's life is its core the least dense?   Student Response Value Correct Answer Feedback  1. Main Sequence 100%      2. Subgiant Branch     3. Helium Fusion     4. Planetary Nebula     5. White Dwarf     Score: 5/5
12.	Quiz M7-12
	What temperature is needed to fuse helium into carbon?   Student Response Value Correct Answer Feedback 1. 5,800 K     2. 100,000 K     3. 15 million K      4. 100 million K 100%      5. one billion K     Score: 5/5
13.	Quiz M7-13
	During the hydrogen shell burning phase   Student Response Value Correct Answer Feedback 1. the star becomes less luminous.      2. the star grows more luminous. 100%      3. helium is burning in the core.     4. the core is expanding.     5. hydrogen is burning in the central core.     Score: 5/5
14.	Quiz M7-14
	A star is on the horizontal branch of the H-R diagram. Which statement is true?   Student Response Value Correct Answer Feedback  1. It is burning both hydrogen and helium. 100%      2. It is about to experience the helium flash.     3. It is burning only helium.     4. The star is contracting.     5. The star is about to return to the main sequence.     Score: 5/5
15.	Quiz M7-15
	Refer to the figure below. What is the name of the path between the points labeled 8 and 9?   Student Response Value Correct Answer Feedback 1. planetary nebula      2. red giant branch 100%      3. horizontal branch     4. asymptotic giant branch     5. white dwarf     Score: 5/5
16.	Quiz M7-16
	Refer to the figure below. What is the name of the path between the points labeled 10 and 11?   Student Response Value Correct Answer Feedback 1. planetary nebula     2. red giant branch     3. horizontal branch      4. asymptotic giant branch 100%      5. white dwarf     Score: 5/5
17.	Quiz M7-17
	The matter in white dwarfs is about a million times denser than matter around you, since you have packed the mass of the Sun into the volume of our Earth. Student Response Value Correct Answer True 100% True Score: 5/5
18.	Quiz M7-18
	Eventually, all low mass stars will become white, then black, dwarfs. Student Response Value Correct Answer True 100% True Score: 5/5
19.	Quiz M7-19
	What are black dwarfs?   Student Response Value Correct Answer Feedback 1. the lowest mass main sequence stars     2. the end result of massive star evolution     3. objects that are not quite massive enough to be stars     4. pulsars that have slowed down and stopped spinning      5. cooled off white dwarfs that no longer glow visibly 100%      Score: 5/5
20.	Quiz M7-20
	Refer to the figure below. What is the name of the path between the points labeled 13 and 14?   Student Response Value Correct Answer Feedback 1. planetary nebula     2. red giant branch     3. horizontal branch     4. asymptotic giant branch      5. white dwarf 100%      Score: 5/5