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
1 of 81 of 8 Items
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)
.
Select the correct answer from the list.(1 point)
To form a nebula, gravity pulls matter together or causes infrared light emission.
How do emission and reflection nebulae differ?(1 point)
Responses
hard line edges
hard line edges
interactions with light
interactions with light
the presence of young stars
the presence of young stars
contain remnants of stars
The correct answer is: interactions with light.
Where could scientists look to observe a black hole?(1 point)
Responses
the edge of the solar system
the edge of the solar system
the solar system asteroid belt
the solar system asteroid belt
the center of the sun
the center of the sun
the center of the Milky Way
The correct answer is: the center of the Milky Way.
Which statement best describes the galaxies closest to the Milky Way?(1 point)
Responses
These galaxies consist of mostly old stars.
These galaxies consist of mostly old stars.
These galaxies are independent of and unaffected by the Milky Way's gravitational pull.
These galaxies are independent of and unaffected by the Milky Way's gravitational pull.
These galaxies include irregular, spiral, and elliptical types.
These galaxies include irregular, spiral, and elliptical types.
These galaxies are all identified as spiral.
The correct answer is: These galaxies include irregular, spiral, and elliptical types.
Which description best summarizes the steps that take place during black hole formation, in the correct order?(1 point)
Responses
A massive star depletes its nuclear fuel; gravity overpowers the star; supernova occurs; core of star collapses.
A massive star depletes its nuclear fuel; gravity overpowers the star; supernova occurs; core of star collapses.
Supernova triggers fusion reactions; massive star implodes due to extreme radiation; volume and mass of star increase rapidly.
Supernova triggers fusion reactions; massive star implodes due to extreme radiation; volume and mass of star increase rapidly.
A small star gains mass through fusion reactions; core of star collapses; increased radiation triggers a supernova.
A small star gains mass through fusion reactions; core of star collapses; increased radiation triggers a supernova.
Supernova explodes a massive star; remaining core expands; nuclear reactions diminish the effects of gravity.