5 Written Questions

1. top (very bright), and broad range of temperatures (blue, white, yellow and orange)
2. An object whose gravity is so strong that nothing, not even light, can escape (formed after supernova with 5 or greater solar mass remaining)
3. The brilliant explosion of a dying supergiant star. Stage after main sequence for high mass stars.
4. white dwarf
5. 1) x-rays detected coming from rotating hot gas near a black hole. 2) The effect of gravity on nearby stars and objects.

5 Matching Questions

1. What is the vertical axis on the H-R Diagram?
2. planetary nebula
3. Constellation
4. nebula
5. Apparent magnitude

1. a A large cloud of gas and dust in space, spread out in a immense volume. Where stars are "born."
2. b The brightness of a star as seen from Earth.
3. c An imaginary pattern of stars in the sky
4. d Absolute magnitude
5. e A huge cloud of gas that is created when the outer layers of a red giant star drift out into space

5 Multiple Choice Questions

1. The blue-white hot core of a star that is left behind after its outer layers have expanded and defined out into space. The death of low to medium-mass stars
   1. pulsar
   2. neutron star
   3. protostar
   4. white dwarf
2. a graph relating the surface temperatures and absolute brightnesses of stars
   1. Constellation
   2. Hertzsprung-Russell diagram
   3. white dwarf
   4. neutron star
3. When the contracting gas and dust becomes so hot that nuclear fusion starts.
   1. planetary nebula
   2. white dwarf
   3. When is a star "born?"
   4. neutron star
4. Decreasing surface temperature
   1. Where is the sun located on a H-R Diagram?
   2. What is the horizontal axis on the H-R Diagram?
   3. Where are most stars located on the H-R Diagram?
   4. What is the vertical axis on the H-R Diagram?
5. temperature (color), mass, and absolute magnitude (also diameter size, stage in life cycle)
   1. Main sequence
   2. 3 main characteristics used to classify stars
   3. neutron star
   4. What is the vertical axis on the H-R Diagram?

5 True/False Questions

1. neutron star → When gravity pulls some of the gas and dust in a nebula together and there is enough mass to form a star (nuclear fusion has not begun)

   True        False

2. When a low mass star runs out of hydrogen fuel, what happens next? → Main Sequence

   True        False

3. Where is the sun located on a H-R Diagram? → yellow and middle (pretty close to center)

   True        False

4. After a supernova explosion, if the core remaining is greater than 5 solar masses, what is formed? → Diagonally across the diagram from bright and hot to dim and cold.

   True        False

5. Solar Mass → main sequence star, 4.6 billion years old, middle of life, medium sized, yellow- 6,000 degrees celsius, center of our solar system

   True        False