Astronomy

1.	Quiz1-Q1
	The Law of Universal Gravitation was developed by:   Student Response Value Correct Answer Feedback 1. Kepler     2. Galileo      3. Newton 100%      4. Copernicus     5. Einstein     Score: 5/5
2.	Quiz1-Q2
	It the mass of a body were doubled, its gravity would become 4X stronger. Student Response Value Correct Answer False 100% False Score: 5/5
3.	Quiz1-Q3
	Newton's gravity would explain why Saturn, so far from the Sun, moves so slowly across the sky. Student Response Value Correct Answer False 0% True Score: 0/5
4.	Quiz1-Q4
	If the distance between two asteroids is doubled, the gravitational force they exert on each other will   Student Response Value Correct Answer Feedback 1. also be doubled.     2. be half as great.      3. be one fourth as great. 100%      4. will be 1/16 as great.     5. be four times greater.     Score: 5/5
5.	Quiz1-Q5
	According to Newton's second law, if you double the force acting on a body, the acceleration will double. Student Response Value Correct Answer True 100% True Score: 5/5
6.	Quiz1-Q6
	How does Newton's Universal Law of Gravitation explain Kepler's laws?   Student Response Value Correct Answer Feedback 1. Universal gravitation implies that the orbits of the planets must be elliptical (Kepler's first law).     2. Universal gravitation implies that the planets will sweep out equal areas in equal times (Kepler's second law).     3. Universal gravitation implies that the planets further from the Sun will move more slowly than the planets closer to the Sun (Kepler's third law).     4. Universal gravitation implies that when a planet is closer to the Sun in its orbit, it will move faster than when it is farther from the Sun (Kepler's second law).      5. Both 3 and 4 are correct. 100%      Score: 5/5
7.	Quiz1-Q7
	The frequency of a water wave gives us its height. Student Response Value Correct Answer True 0% False Score: 0/5
8.	Quiz1-Q8
	Consider this diagram. Which statement is true?   Student Response Value Correct Answer Feedback 1. The wavelength is 4.      2. The wavelength is 6. 100%      3. The wavelength is 8.     4. The wavelength is 12.     5. The wavelength cannot be determined from this diagram     Score: 5/5
9.	Quiz1-Q9
	Which of these is constant for ALL types of electromagnetic radiation in a vacuum?   Student Response Value Correct Answer Feedback 1. amplitude     2. wavelength     3. frequency      4. velocity 100%      5. photon energy     Score: 5/5
10.	Quiz1-Q10
	Which form of electromagnetic radiation is absorbed by carbon dioxide and water vapor in our atmosphere?   Student Response Value Correct Answer Feedback 1. visible light     2. ultraviolet      3. infrared 100%      4. radio     5. gamma rays     Score: 5/5
11.	Quiz1-Q11
	X-ray telescopes are located in orbit around the Earth because   Student Response Value Correct Answer Feedback 1. X-ray telescopes on Earth would have to be too big.     2. X-ray telescopes are cheap and easy to launch into space.     3. there are too many X-ray telescopes on Earth, so now they are put in space.      4. X-rays don't reach the surface of Earth. 100%      5. the X-rays that come out of the telescopes are dangerous to humans.     Score: 5/5
12.	Quiz 1-Q12
	Very low temperature molecular clouds emit most of their light in which part of the electromagnetic spectrum?   Student Response Value Correct Answer Feedback 1. the visible     2. the X-ray     3. the ultraviolet      4. the radio 100%      5. the infrared     Score: 5/5
13.	Quiz 1-Q13
	The spectral lines of each element are distinctive to that element, whether we are looking at emission or absorption lines. Student Response Value Correct Answer True 100% True Score: 5/5
14.	Quiz 1-Q14
	The larger the red shift, the faster the distant galaxy is rushing toward us. Student Response Value Correct Answer False 100% False Score: 5/5
15.	Quiz 1-Q15
	In our Sun, the spectral lines of hydrogen are weak, compared to their appearance in hotter stars. Student Response Value Correct Answer True 100% True Score: 5/5
16.	Quiz 1-Q16
	What is spectroscopy?   Student Response Value Correct Answer Feedback  1. an analysis of the way in which atoms absorb and emit light 100%      2. a study of the geometry of rainbows     3. an observational technique to measure the brightness of light at different colors     4. the use of CCDs to capture light more efficiently than with photographic film     5. a method to freeze atmospheric turbulence for better resolution     Score: 5/5
17.	Quiz 1-Q17
	Emission lines of hydrogen that are found in the ultraviolet part of the electromagnetic spectrum are formed by electrons transitioning from   Student Response Value Correct Answer Feedback 1. any level to level 2     2. level 2 to any level      3. any level to level 1 100%      4. level 1 to any level     5. any level to level 3     Score: 5/5
18.	Quiz 1-Q18
	Since the difference in energy between the different rotational states in a molecule is very small, many molecular lines can be observed with:   Student Response Value Correct Answer Feedback 1. visible light spectrometers.      2. radio or microwave telescopes. 100%      3. high energy observatories like Chandra, in orbit above our atmosphere.     4. ultraviolet balloons flying above the ozone layer.     5. infrared telescopes on mountaintops.     Score: 5/5
19.	Quiz 1-Q19
	The splitting of spectral lines in the presence of strong magnetic fields is the:   Student Response Value Correct Answer Feedback 1. Doppler Effect.     2. Second Law of Kirchhoff.      3. Zeeman Effect. 100%      4. Photoelectric Effect.     5. polarization of sunlight.     Score: 5/5
20.	Quiz 1-Q20
	What information about an astronomical object can be determined by observing its spectrum?   Student Response Value Correct Answer Feedback 1. its temperature     2. its radial motion      3. its chemical composition 0%     4. whether it has a strong magnetic field     5. all of the above      Score: 0/5