astronomy

1.	QM5 - Q1
	Hydrogen is the major gas in the interstellar medium Student Response Value Correct Answer True 100% True Score: 5/5
2.	QM5 - Q2
	Interstellar matter is distributed very evenly through the galaxy. Student Response Value Correct Answer False 100% False Score: 5/5
3.	QM5 - Q3
	Emission nebulae are blue. Student Response Value Correct Answer True 0% False Score: 0/5
4.	QM5 - Q4
	What effect does even thin clouds of dust have on light passing through them?   Student Response Value Correct Answer Feedback 1. The light that passes though them is blue shifted due to the cloud's approach.      2. It dims and reddens the light of all more distant stars. 100%      3. Even a little can completely block all light, such as the Horsehead Nebula.     4. Its motion causes the light of stars beyond to twinkle.     5. Its motion causes all light to be red shifted as it passes through these clouds.     Score: 5/5
5.	QM5 - Q5
	Which of the following describes the shape of dust particles, based on polarization of light?   Student Response Value Correct Answer Feedback 1. diamonds.     2. cubes.     3. spheres     4. disks      5. rodlike 100%      Score: 5/5
6.	QM5 - Q6
	Some regions along the plane of the Milky Way appear dark because   Student Response Value Correct Answer Feedback 1. there are no stars in these areas.     2. stars in that region are hidden by interstellar gas.      3. stars in that region are hidden by dark dust particles. 100%      4. many brown dwarfs in those areas absorb light which they turn into heat.     5. many black holes absorb all light from those directions.     Score: 5/5
7.	QM5 - Q7
	The spectra of interstellar gas clouds show that they have the same basic composition as   Student Response Value Correct Answer Feedback 1. interstellar dust.     2. Earth's atmosphere.      3. stars. 100%      4. asteroids.     5. the Martian polar caps.     Score: 5/5
8.	QM5 - Q8
	The "Local Bubble" was probably created by a nearby supernova in the distant past. Student Response Value Correct Answer True 100% True Score: 5/5
9.	QM5 - Q9
	The 21 cm line of hydrogen is strongly absorbed by interstellar dust. Student Response Value Correct Answer True 0% False Score: 0/5
10.	QM5 - Q10
	Molecular clouds are much warmer than typical interstellar gas clouds. Student Response Value Correct Answer True 0% False Score: 0/5
11.	QM5 - Q11
	The overall dimming of starlight by interstellar matter is called   Student Response Value Correct Answer Feedback  1. extinction. 100%      2. reddening.     3. absorption.     4. emission.     5. scattering.     Score: 5/5
12.	QM5 - Q12
	The relative density of dust to gas is least in which place?   Student Response Value Correct Answer Feedback  1. the interstellar medium 0%     2. dark nebulae     3. the atmosphere of Earth      4. molecular clouds     5. reflection nebulae     Score: 0/5
13.	QM5 - Q13
	Emission nebulae like M42 occur only near stars that emit large amounts of   Student Response Value Correct Answer Feedback 1. visible light.     2. microwaves.      3. ultraviolet radiation. 100%      4. infrared heat.     5. X-rays and gamma rays.     Score: 5/5
14.	QM5 - Q14
	What do "forbidden" lines reveal about interstellar space?   Student Response Value Correct Answer Feedback  1. The density or pressure of this gas is much lower than can be produced in a laboratory. 100%      2. The laws of physics are not the same in space as they are on Earth.     3. There are unknown elements in space that do not correspond to elements found on Earth.     4. There are molecules found in meteorites and interstellar dust that are not found on Earth.     5. All of the above are true.     Score: 5/5
15.	QM5 - Q15
	The compositions of dark clouds can be determined through absorption spectra. Student Response Value Correct Answer True 100% True Score: 5/5
16.	QM5 - Q16
	We often find dark nebulae associated with bright H II regions. Student Response Value Correct Answer True 100% True Score: 5/5
17.	QM5 - Q17
	Most molecules found in the giant molecular clouds are based on silicon. Student Response Value Correct Answer False 100% False Score: 5/5
18.	QM5 - Q18
	The 1.----- of light passing through thin dust clouds lets us map the Galaxy's magnetic field.   Student Response Value Correct Answer 1.  Large Magellanic Cloud  0% Equals polarization (100%) Score: 0/5
19.	QM5 - Q19
	In the Milky Way galaxy, gas and dust are found   Student Response Value Correct Answer Feedback 1. in molecular clouds.      2. everywhere. 100%      3. in neutral hydrogen clouds.     4. in dark nebulae.     5. in emission nebulae.     Score: 5/5
20.	QM5 - Q20
	Most interstellar clouds are    Student Response Value Correct Answer Feedback  1. much bigger than our solar system 100%      2. about the size of Earth.     3. similar in size to clouds in Earth's atmosphere.     4. much smaller than the clouds in Earth's atmosphere.     5. about the size of a wavelength of light.     Score: 5/5