How does the appearance of spiral galaxies vary? Select the two correct answers.(1 point)
Responses
Some are more elongated in shape than others.
Some are more elongated in shape than others.
They vary in the brightness of stars located on their arms.
They vary in the brightness of stars located on their arms.
Some have a band of stars and materials through their middle, but others do not.
Some have a band of stars and materials through their middle, but others do not.
They vary in how tightly their arms are wound.
Some are more elongated in shape than others.
They vary in the brightness of stars located on their arms.
Which component that makes up the bulk of all galaxies?(1 point)
Responses
dark matter
dark matter
dust
dust
stars
stars
gas
stars
According to astronomers, how many galaxies are distributed across the observable universe?(1 point)
Responses
50
50
1 trillion
1 trillion
several thousand
several thousand
100 billion
100 billion
Which statements describe elliptical galaxies? Select the two correct answers.(1 point)
Responses
They are the most common galaxy type.
They are the most common galaxy type.
They typically contain very little gas and dust.
They typically contain very little gas and dust.
They include the universe's largest galaxies.
They include the universe's largest galaxies.
They include the Milky Way.
They typically contain very little gas and dust.
They include the universe's largest galaxies.
How does the appearance of spiral galaxies vary? Select the two correct answers.(1 point)
Responses
They vary in the brightness of stars located on their arms.
They vary in the brightness of stars located on their arms.
Some have a band of stars and materials through their middle, but others do not.
Some have a band of stars and materials through their middle, but others do not.
They vary in how tightly their arms are wound.
They vary in how tightly their arms are wound.
Some are more elongated in shape than others.
They vary in the brightness of stars located on their arms.
Some have a band of stars and materials through their middle, but others do not.
Galaxy Types Quick Check
4 of 44 of 4 Items
Question
Which component that makes up the bulk of all galaxies?(1 point)
Responses
dust
dust
dark matter
dark matter
gas
gas
stars