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100
In the formation of the solar system, nearly all of the mass of the solar nebula became... A. the terrestrial planets B. the gas giants C. the sun D. the Oort cloud
What is the sun (C)
100
A H-R diagram A. is a map of the positions of the stars B. graphs stars according to their size and distance. C. lists every know star D. graphs a sample of stars according to surface temperature and absolute brightness.
What is graphs a sample of stars according to surface temperature and absolute brightness. (D)
100
low mass and medium mass stars eventually A. grow into super giants B. become supernovas C. become neutron stars. D. turn into white dwarfs
What is D. turn into white dwarfs
100
Galaxies are classified into four groups based on their A. shapes B. Sizes C. number of stars D. brightness
What is A. shapes
100
Which of the following provides support for the big bang theory? a. red shift b. cosmic microwave background radiation c. elliptical galaxies d. both a and b
What is d. both a and b
200
The suns energy is produced by? A. the sun burning fuel B. nuclear fission C. an ordinary chemical reaction D. nuclear fusion
What is nuclear FUSION (D)
200
The life cycle of a star begins with a cloud of gas and dust called a? A. protoplanet B. constellation C. nebula D. Protosun
What is a nebula (C)
200
What is a pulsar? A. the remains of a low-mass star after it explodes B. a spinning neutron star emitting radio waves C. another name for a protostar D. the state before a dying star becomes a supernova
What is B. a spinning neutron star emitting radio waves
200
Older stars are most likely found in A. the arms of spiral and barred-spiral galaxies B. elliptical galaxies C. irregular galaxies D. both a and b
What is B. elliptical galaxies
200
Dark matter can be detected by its A. cosmic microwave background radiation B. red shift C. gravitational effects on visible matter D. velocity
What is C. gravitational effects on visible matter
300
The distance between stars is typically measure in? A. light years B. kilometers C. Au's D. Miles
What is light years.
300
Both high-mass and low-mass adult stars are classified as? A. main-sequence stars B. white dwarfs c. supernovas D. Neutron stars
What are main-sequence stars (A)
300
which of the following is true about more than half of all stars? A. they are dying red giants B. they are visible to the unaided eye c. they are members of a star system d. they are high-mass stars
What is c. they are members of a star system
300
When the absorption line of a galaxy shift toward the blue end of the spectrum, it means that the galaxy is? A. moving away from earth B. small and young C. moving closer to Earth d. large and old
What is C. moving closer to Earth
300
Much of the mass of the universe may be composed of A. electromagnetic waves b. cosmic microwaved C. background radiation d. Dark matter
What is d. Dark matter
400
Astronomers classify stars according to their? A. distance from the earth B. color, size and absolute brightness C. age and parallax D. all of the above
What is color, size and absolute brightness (B)
400
All stars remain on the main sequence A. until they stabilize B. for about 90% of their lifetimes C. until they become protostars D. for about 10 billion years
What is B. for about 90% of their lifetimes
400
why is studying star clusters useful? A. because there is such a large diversity of stars in a cluster B. because they are about the same age and distance from earth. c. because they are all about the same size and temperature. D. because all of them are always young, bright stars
What is B. because they are about the same age and distance from earth.
400
Hubble's Law states that the speed at which a galaxy is moving away is proportional to the A. mass of the galaxy b. number of starts in the galaxy c. galaxy's distance from earth d. age of the galaxy
What is c. galaxy's distance from earth
500
The apparent brightness of a star.,.. A. varies with the position from which it is viewed B. can be calculated from its absolute brightens and mass. C. is greater as distance from the sun increases D. is a measure of its light viewed from any position
What is varies with the position from which it is viewed (A)
500
Which kind of star is most likely to spend the longest time on the mains sequence? A. a low-mass red star B. a yellow star like the sun C. a high-mass blue star D. a bright white star
What is A. a low-mass red star
500
a large group of older stars would be found in which of the following star clusters? A. open cluster b. association c. globular cluster d. both a and b
What is c. globular cluster
500
The big bang theory explains the A. origin of the universe B. life cycle of a star C. Doppler effect d. arrangement of constellations
What is A. origin of the universe