Question

lives of stars
understanding main ideas
fill in each blank with the correct letter from the diagram.

1. red giant or supergiant
2. where fusion begins
3. part of a nebula
4. white dwarf, neutron star, or black hole
5. the stage the sun is in

fill in the blank.

1. how long a star lives and what it becomes at the end of its life depend primarily on its _

building vocabulary
from the list below, choose the term that best matches each phrase.

1. pulsar

a. exerts such a strong gravitational pull that no electromagnetic radiation can escape

1. white dwarf

b. a huge cloud of gas or dust in space

1. nebula

c. what an average - sized star becomes at the end of its life

1. protostar

d. the earliest stage of a stars life

1. supernova

e. emits pulses of radio waves

1. neutron star

f. shines brightly in the center of a distant galaxy because of the friction of material spiraling around it

1. black hole

g. formed from the leftover material after a giant star explodes, with three times the mass of the sun, but a diameter of only about 20 kilometers

1. quasar

h. an explosion that occurs at the end of a giant stars life
unit 6 resources 83
science explorer earth science

Explanation:

1. A red - giant or super - giant is a later stage in a star's life.
2. Fusion begins in a protostar as it contracts and heats up.
3. A nebula is a cloud of gas and dust from which stars form.
4. Depending on mass, a star can end as a white dwarf, neutron star, or black hole.
5. The Sun is in the main - sequence stage.
6. A star's lifetime and end - state depend on its mass.
7. A pulsar emits pulses of radio waves.
8. A white dwarf is what an average - sized star becomes at the end of its life.
9. A nebula is a huge cloud of gas or dust in space.
10. A protostar is the earliest stage of a star's life.
11. A supernova is an explosion that occurs at the end of a giant star's life.
12. A neutron star is formed from the leftover material after a giant star explodes, with a high mass but small diameter.
13. A black hole exerts such a strong gravitational pull that no electromagnetic radiation can escape.
14. A quasar shines brightly in the center of a distant galaxy due to the friction of material spiraling around it.

Answer:

1. Later stage of star life
2. Protostar
3. Nebula
4. End - states of stars
5. Main - sequence
6. Mass
7. e
8. c
9. b
10. d
11. h
12. g
13. a
14. f