Question

Which description best summarizes the steps that take place during black hole formation, in the correct order?(1 point)
Responses

Supernova triggers fusion reactions; massive star implodes due to extreme radiation; volume and mass of star increase rapidly.

A massive star depletes its nuclear fuel; gravity overpowers the star; supernova occurs; core of star collapses.

Supernova explodes a massive star; remaining core expands; nuclear reactions diminish the effects of gravity.

A small star gains mass through fusion reactions; core of star collapses; increased radiation triggers a supernova.
Answer
What is the main challenge astronomers face when trying to directly detect black holes?(1 point)
Responses

Black holes are too small.

Black holes trap all light.

Black holes are empty.

Black holes are too black.
Answer
How do emission and reflection nebulae differ?(1 point)
Responses

hard line edges

the presence of young stars

interactions with light

contain remnants of stars
Answer
To form a nebula, ______ pulls matter together or causes ______
.
Answer
To form a nebula, gravity pulls matter together or causes ______
infrared light emission
pressure change
an explosion
Answer
Astronomers think that most galaxies are centered by a ______, which exerts ______
that binds the galaxy together
Answer
Astronomers think that most galaxies are centered by a black hole
, which exerts _______ that binds the galaxy together.
gravitational pull
magnetic pull
centrifugal force
centripetal force
Answer
Which statement best describes the galaxies closest to the Milky Way?(1 point)
Responses

These galaxies are all identified as spiral.

These galaxies are independent of and unaffected by the Milky Way's gravitational pull.

These galaxies include irregular, spiral, and elliptical types.

These galaxies consist of mostly old stars.
Answer
Where could scientists look to observe a black hole?(1 point)
Responses

the edge of the solar system

the center of the sun

the center of the Milky Way

the solar system asteroid belt
Answer
Which of these characteristics of a star make it most likely to become a black hole? Select the two correct answers.(1 point)
Responses

Its mass is greater than 20 times the mass of the sun.

It has an abundant supply of hydrogen.

It is dying.

Its mass is equal to that of the sun.
Answered by GPT 3.5
A massive star depletes its nuclear fuel; gravity overpowers the star; supernova occurs; core of star collapses.
Answered by GPT 3.5
Black holes trap all light.
Answered by GPT 3.5
Emission nebulae and reflection nebulae differ in their interactions with light.
Answered by GPT 3.5
To form a nebula, gravity pulls matter together or causes compression.
Answered by GPT 3.5
To form a nebula, gravity pulls matter together or causes a pressure change.
Answered by GPT 3.5
Astronomers think that most galaxies are centered by a supermassive black hole, which exerts a gravitational force that binds the galaxy together.
Answered by GPT 3.5
Astronomers think that most galaxies are centered by a black hole, which exerts a gravitational pull that binds the galaxy together.
Answered by GPT 3.5
These galaxies include irregular, spiral, and elliptical types.
Answered by GPT 3.5
Scientists could look to observe a black hole at the center of the Milky Way.
Answered by GPT 3.5
The two characteristics of a star that make it most likely to become a black hole are:

1. Its mass is greater than 20 times the mass of the sun.
2. It is dying.