Stars and the universe

Worksheet: Stars and the universe

Name:Class:

Answer the questions.

1. What kind of object is the Sun?
   a) A cometb) A moonc) A planetd) A star
2. The Sun appears much brighter than other stars because it is much closer to Earth.
   a) Trueb) False
3. Which process in the Sun's core releases its energy?
   a) Burning coalb) Chemical rustingc) Nuclear fissiond) Nuclear fusion
4. What is a galaxy?
   a) A cloud of gas inside our Solar Systemb) A group of planets around one starc) A huge group of stars, gas and dust held together by gravityd) A single very large star
5. Which galaxy contains our Solar System?
   a) Andromedab) The Milky Wayc) The Sombrerod) The Whirlpool
6. Roughly how many stars are in the Milky Way?
7. What does a light year measure?
   a) Brightnessb) Distancec) Speedd) Time
8. A light year is the distance light travels in one year.
   a) Trueb) False
9. A star is 8 light years away. What do we see when we look at it?
   a) Light that left it 8 years agob) Light that left it 80 years agoc) Light that will leave it in 8 yearsd) The star as it is right now
10. Stars form from clouds of gas and dust called what?
    a) Asteroidsb) Cometsc) Galaxiesd) Nebulae
11. What will the Sun become after it stops being a main sequence star and swells up?
    a) A black holeb) A cometc) A red giantd) A supernova
12. What is the huge explosion at the end of a massive star's life called?
13. The Sun will turn into a black hole when it dies.
    a) Trueb) False
14. Which force keeps the planets in orbit around the Sun?
    a) Air resistanceb) Frictionc) Gravityd) Magnetism
15. What is the name for the curved path a planet takes around the Sun?
16. If a planet were moved farther from the Sun, the Sun's pull on it would be...
    a) Strongerb) The samec) Weakerd) Zero