What is the main challenge astronomers face when trying to directly detect black holes?(1 point)
Responses
Black holes trap all light.
Black holes trap all light.
Black holes are too black.
Black holes are too black.
Black holes are empty.
Black holes are empty.
Black holes are too small.
Black holes are too small.
Black Holes Quiz
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Question
What is the main challenge astronomers face when trying to directly detect black holes?(1 point)
Responses
Black holes trap all light.
Black holes trap all light.
Black holes are too black.
Black holes are too black.
Black holes are empty.
Black holes are empty.
Black holes are too small.
The correct answer is: Black holes trap all light.
Which of these characteristics of a star make it most likely to become a black hole? Select the two correct answers.(1 point)
Responses
It is dying.
It is dying.
Its mass is equal to that of the sun.
Its mass is equal to that of the sun.
It has an abundant supply of hydrogen.
It has an abundant supply of hydrogen.
Its mass is greater than 20 times the mass of the sun.
The two correct answers are:
- Its mass is greater than 20 times the mass of the sun.
- It is dying.
Select the correct answer from the list.(1 point)
Astronomers think that most galaxies are centered by a
Select Answer
, which exerts
Select Answer
that binds the galaxy together.
Select the correct answer from the list.(1 point)
Astronomers think that most galaxies are centered by a
Select Answer: supermassive black hole, which exerts
Select Answer: gravitational force
Select the correct answer from the list.(1 point)
Astronomers think that most galaxies are centered by a (black hole/nebula/large planet/massive star), which exerts (centripetal force/centrifugal force/gravitational pull/magnetic pull ) that binds the galaxy together.
Select the correct answer from the list.(1 point)
Astronomers think that most galaxies are centered by a black hole, which exerts gravitational pull that binds the galaxy together.
Select the correct answer from the list.(1 point)
To form a nebula, (Pressure/Heat/gravity) pulls matter together or causes
(an explosion/pressure change/infrared light emission)
.