Download NAME:______ANSWER KEY_______________________Period

NAME:___________ANSWER KEY_______________________Period:__________
Unit 10-11 Review Sheet ANSWER KEY
1. What is the universe made up of? matter, energy, and space
2. What does light year measure? distance
3. Why do we use light year instead of kilometers? Kilometers would be way to big of
a number
4. Change the following number 78,000,000 to scientific notation. 7.8 x 107
5. Write 1.90 x 108 in standard number form. 190,000,000
6. Define Nebula: a large cloud of gas and dust from which a star begins
7. Main Sequence Star turns into a giant when it loses all its hydrogen.
8. What type of star is our Sun on the H-R diagram? Main
Sequence Star
9. Which group of stars on the H-R diagram is the brightest? Main
Sequence Star
10. After a star dies what happens to the remains? It turns back
into gas and dust and the CYCLE starts over again.
11. Our Sun is at what stage of it’s life cycle? Our Sun is a Main
Sequence star and it is halfway through it’s life cycle. Our
Sun is 4.5 billion years old and it has 5.5 billion years
left.
12. The brightness of the star is most dependent on the star’s mass.
13. Which group of stars on the H-R diagram do most stars start out as? Main
Sequence Stars
Fill in the following stars life cycles:
14. Sun-Like Star--->Red Giant--->Nebula--->White Dwarf--->Black Dwarf
15. Huge Star--->Red Supergiant--->Supernova--->Neutron Star
16. Giant Star--->Red Supergiant--->Supernova--->Black Hole
17. Define Absolute magnitude: the actual brightness of the star
18. Define Apparent magnitude: how bright the star looks from earth
19. The black hole is a region in space where the gravitational pull is so great that light
cannot escape.
20. A region in space that is so dense that nothing, even light energy, can’t escape its
gravitational field is know as a black hole.
21. What are the three type of galaxies? spiral, elliptical, and irregular
22. The galaxy that has spiral arms with a bulge it the center is the spiral galaxy.
23. The galaxy that has an elongated shape is the elliptical galaxy.
24. The galaxy with no shape is the irregular galaxy.
25. The Milky Way is an example of a galaxy with a spiral shape.
26. Earth is in which kind of galaxy? Spiral
27. Define Quasar: a galaxy that has a black hole in it’s center
28. What did Copernicus think? he thought the first to suggest that the Earth was
not the center of the Universe
29. Define Theory: a logical explanation of events that occur in nature
30. Which theory of the universe is the most accepted by all the scientists? THE BIG
BANG
NAME:_____________________________________________Period:__________
Unit 10-11 Review Sheet
1. What is the universe made up of?
2. What does light year measure?
3. Why do we use light year instead of kilometers?
4. Change the following number 78,000,000 to scientific notation.
5. Write 1.90 x 108 in standard number form.
6. Define Nebula:
7. Main Sequence Star turns into a _________when it loses all its hydrogen.
8. What type of star is our Sun on the H-R diagram?
9. Which group of stars on the H-R diagram is the
brightest?
10. After a star dies what happens to the remains? I
11. Our Sun is at what stage of it’s life cycle?
12. The ___________________ of the star is most
dependent on the star’s mass.
13. Which group of stars on the H-R diagram do
most stars start out as?
Label the Star’s Life Cycles below:
14. Sun-Like Star--->___________--->___________--->___________--->___________
15. Huge Star--->___________--->___________--->___________
16. Giant Star --->___________--->___________--->___________
17. Define Absolute magnitude:
18. Define Apparent magnitude:
19. The __________________ is a region in space where the gravitational pull is so
great that light cannot escape.
20. A region in space that is so dense that nothing, even light energy, can escape its
gravitational field is know as a ___________________.
21. What are the three type of galaxies?
22. The galaxy that has spiral arms with a bulge it the center is the ________________.
23. The galaxy that has an elongated shape is the __________________.
24. The galaxy with no shape is the _______________________.
25. The ________________ is an example of a galaxy with a spiral shape.
26. Earth is in which kind of galaxy?
27. Define Quasar:
28. What did Copernicus think?
29. Define Theory:
30. Which theory of the universe is the most accepted by all the scientists?