Download Document

Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Chapter Review
USING KEY TERMS
The statements below are false. For each statement, replace the underlined term to
make a true statement.
1. The distance that light travels in space in 1 year is called apparent magnitude.
2. Globular clusters are groups of stars that are usually located along the spiral
disk of a galaxy.
3. Galaxies that have very bright centers and very little dust and gas are called
spiral galaxies.
4. When you look at white light through a glass prism, you see a rainbow of
colors called a supernova.
UNDERSTANDING KEY IDEAS
Multiple Choice
_____ 5. A scientist can identify a star’s composition by looking at
a. the star’s prism.
b. the star’s continuous spectrum.
c. the star’s absorption spectrum.
d. the star’s color.
_____ 6. If the universe expands forever,
a. the universe will collapse.
b. the universe will repeat itself.
c. the universe will remain just as it is today.
d. stars will age and die and the universe will become cold and dark.
_____ 7. The majority of stars in our galaxy are
a. blue stars.
c. main-sequence stars.
b. white dwarfs.
d. red giants.
_____ 8. Which of the following is used to measure the distance between objects
in space?
a. parallax
c. zenith
b. magnitude
d. altitude
_____ 9. Which of the following stars would be seen as the brightest star?
a. Alcyone, which has an apparent magnitude of 3
b. Alpheratz, which has an apparent magnitude of 2
c. Deneb, which has an apparent magnitude of 1
d. Rigel, which has an apparent magnitude of 0
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science and technology
42
Stars, Galaxies, and the Universe
Name ______________________________ Class ___________________ Date __________________
Chapter Review continued
Short Answer
10. Describe how scientists classify stars.
____________________________________________________________________
____________________________________________________________________
11. Explain how stars at different stages in their life cycle appear on the H-R
diagram.
____________________________________________________________________
____________________________________________________________________
12. Explain the difference between the apparent motion and actual motion of stars.
____________________________________________________________________
____________________________________________________________________
13. Describe two ways that scientists calculate the age of the universe.
____________________________________________________________________
____________________________________________________________________
_______________________________________________________________
14. Making Comparisons Explain the differences between main-sequence stars,
giant stars, super giant stars, and white dwarfs.
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
15. Evaluating Sources According to the big bang theory, how did the universe
begin? What evidence supports this theory?
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science and technology
43
Stars, Galaxies, and the Universe
Name ______________________________ Class ___________________ Date __________________
16. Evaluating Data If a certain star displayed a large parallax, what could you say
about the star’s distance from Earth?
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
Interpreting graphics
The graph below shows Hubble’s law, which relates how far galaxies are from
Earth and how fast they are moving away from Earth. Use the graph below to
answer the questions that follow.
17. Look at the point that represents galaxy A in the graph. How far is galaxy A
from Earth, and how fast is it moving away from Earth?
____________________________________________________________________
____________________________________________________________________
18. If a galaxy is moving away from Earth at 15,000 km/s, how far is the galaxy
from Earth?
____________________________________________________________________
____________________________________________________________________
19. If a galaxy is 90,000,000 light-years from Earth, how fast is it moving away
from Earth?
____________________________________________________________________
____________________________________________________________________
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science and technology
44
Stars, Galaxies, and the Universe