Question

science explorer earth science

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

Explanation:

1. A pulsar emits pulses of radio waves, so it matches 'd'. 8. A white - dwarf is what an average - sized star becomes at the end of its life, so it matches 'c'. 9. A nebula is a huge cloud of gas or dust in space, so it matches 'a'. 10. A protostar is the earliest stage of a star's life, so it matches 'e'. 11. A supernova is an explosion that occurs at the end of a giant star's life, so it matches 'h'. 12. A neutron star is formed from the leftover material after a giant star explodes, with about three times the mass of the sun but a diameter of only about 20 kilometers, so it matches 'g'. 13. A black hole exerts such a strong gravitational pull that no electromagnetic radiation can escape, so it matches 'b'. 14. A quasar shines brightly in the center of a distant galaxy because of the friction of material spiraling around it, so it matches 'f'.

Answer:

1. d. emits pulses of radio waves
2. c. what an average - sized star becomes at the end of its life
3. a. a huge cloud of gas or dust in space
4. e. the earliest stage of a star's life
5. h. an explosion that occurs at the end of a giant star's life
6. 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
7. b. exerts such a strong gravitational pull that no electromagnetic radiation can escape
8. f. shines brightly in the center of a distant galaxy because of the friction of material spiraling around it