Question

exam 4 astronomy 1030 dr. partin
choose the best answer.
multiple choice questions

1. what percent of the mass of the solar system is in the sun?

a. 10%
b. 50%
c. 80%
d. 89.9%
e. 99.99%

1. a good place to find meteorites is

a. utah
b. the moon
c. a lake
d. antarctica
e. australia

1. pluto is

a. the most distant planet in the solar system that we know of
b. part of the oort cloud
c. a kuiper belt object
d. part of the asteroid belt
e. none of the above

1. a problem with life arising on titan is

a. titanium rain
b. a thin atmosphere
c. a very low temperature
d. titan was captured by saturn relatively recently
e. titan sometimes passes through the rings of saturn

1. the core of the sun has a temperature of about

a. 2500 k
b. 5700 k
c. 10,000 k
d. 2,000,000 k
e. 15,000,000 k

1. the part of the sun we normally see is the

a. core
b. sunspots
c. chromosphere
d. photosphere
e. corona

Explanation:

1. The Sun contains about 99.86% of the mass of the Solar System, so the closest option is D.
2. Antarctica is a great place to find meteorites due to its ice - it preserves them and makes them easier to spot against the white background.
3. Pluto is classified as a Kuiper Belt object. It is no longer considered a planet.
4. Titan has a very low temperature which is a problem for life arising as biological processes are difficult at such low temperatures.
5. The core of the Sun has a temperature of about 15,000,000 K.
6. The part of the Sun we normally see is the photosphere.

Answer:

1. D. 99.86% (closest option is D. 99.9%)
2. D. Antarctica
3. C. a Kuiper Belt object
4. C. a very low temperature
5. E. 15,000,000 K
6. D. photosphere