Download stars concept review

Name ______________________________ Class ___________________ Date __________________
Assessment
Concept Review
Section: Characteristics of Stars
In the space provided, write the letter of the definition that best matches the term
or phrase.
_____ 1. absolute magnitude
_____ 2. light-year
_____ 3. parallax
_____ 4. apparent
magnitude
_____ 5. Doppler effect
a. the apparent shift in wavelength of light as
the source moves away from or toward an
observer
b. an apparent shift in position of an object
when viewed from different locations
c. the brightness of a star as seen from Earth
d. the brightness of a star if all the stars were
at a uniform distance from Earth
e. the distance light travels in a year
MULTIPLE CHOICE
In the space provided, write the letter of the answer choice that best completes
each statement or best answers each question.
_____ 6. What color are the coolest stars?
a. orange
b. blue
c. white
d. red
_____ 7. Stars appear to move in the sky because
a. the sky is rotating.
b. Earth is moving.
c. the universe is expanding.
d. galaxies are forming.
_____ 8. A star moving away from Earth has a spectrum that is
a. losing its color.
c. shifted toward red.
b. shifted toward blue.
d. unchanged.
_____ 9. About how many stars are visible from Earth without a telescope?
a. 6,000
c. 3 billion
b. many billions
d. a million
_____ 10. Scientists determine the composition and temperature of stars
a. by sampling matter on the surface of stars.
b. by analyzing the vibrations that stars emit.
c. through magnetic testing.
d. by analyzing the spectra of the light that stars emit.
Original content Copyright © Holt McDougal. All rights reserved. Additions and changes to the original content are the responsibility of the instructor.
Holt McDougal Earth Science
29
Stars, Galaxies, and the Universe
Name ______________________________ Class ___________________ Date __________________
Assessment
Concept Review
Section: Stellar Evolution
MATCHING
In the space provided, write the letter of the definition that best matches the term
or phrase.
_____ 1. nebula
_____ 2. nova
_____ 3. neutron
star
_____ 4. protostar
_____ 5. black hole
a. a dense, collapsed star whose electrons and protons
smashed together to form neutrons
b. a large cloud of gas and dust in space where stars
are born
c. a shrinking, spinning region in space with a central
concentration of matter
d. a large explosion on a star that makes it brighter
e. an object so dense that even light cannot escape its
gravity
MULTIPLE CHOICE
In the space provided, write the letter of the answer choice that best completes
each statement or best answers each question.
_____ 6. A small, hot, extremely dense core left after a star collapses is a
a. red giant.
c. nova.
b. pulsar.
d. white dwarf.
_____ 7. During the main-sequence stage, how is energy generated in a star’s
core?
a. Hydrogen fuses into helium.
b. Carbon fuses into hydrogen.
c. Helium fuses into hydrogen.
d. Carbon fuses into oxygen.
_____ 8. How long would a star with the sun’s mass stay on the main sequence?
a. a million years
c. 10 trillion years
b. a billion years
d. 10 billion years
_____ 9. After a protostar’s temperature rises to 10,000,000 °C, it becomes a star
when
a. nuclear fusion ends.
c. nuclear fission begins.
b. nuclear fusion begins.
d. nuclear fission ends.
_____ 10. A large, bright star whose hot core has used most of its hydrogen is a
a. nova.
c. giant.
b. supernova.
d. pulsar.
Original content Copyright © Holt McDougal. All rights reserved. Additions and changes to the original content are the responsibility of the instructor.
Holt McDougal Earth Science
30
Stars, Galaxies, and the Universe