Which component that makes up the bulk of all galaxies?(1 point)

Question

Responses

stars
stars

dust
dust

gas
gas

dark matter
dark matter
Question 2
According to astronomers, how many galaxies are distributed across the observable universe?(1 point)
Responses

1 trillion
1 trillion

100 billion
100 billion

several thousand
several thousand

50
50
Question 3
How does the appearance of spiral galaxies vary? Select the two correct answers.(1 point)
Responses

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 the brightness of stars located on their arms
They vary in the brightness of stars located on their arms

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.
Some are more elongated in shape than others.
Question 4
Which statements describe elliptical galaxies? Select the two correct answers.(1 point)
Responses

They typically contain very little gas and dust.
They typically contain very little gas and dust.

They are the most common galaxy type.
They are the most common galaxy type.

They include the Milky Way.
They include the Milky Way.

They include the universe's largest galaxies.

Answer 1

Here are the answers to your questions:

Question 1: Which component makes up the bulk of all galaxies?
Response: dark matter

Question 2: According to astronomers, how many galaxies are distributed across the observable universe?
Response: 100 billion

Question 3: How does the appearance of spiral galaxies vary? Select the two correct answers.
Responses:

• Some have a band of stars and materials through their middle, but others do not
• They vary in how tightly their arms are wound.

Question 4: Which statements describe elliptical galaxies? Select the two correct answers.
Responses:

• They typically contain very little gas and dust.
• They include the universe's largest galaxies.