Galaxy Types Quick Check ~
For practice 👀
Which statements describe elliptical galaxies?
They include the universe’s largest galaxies
They typically contain very little gas and dust
How does the appearance of the spiral galaxies vary?
Some have a band of stars and materials through their middle, but other do not
They vary in how tightly their arms are wound
100 billion
Which component that makes up the bulk of all galaxies?
Dark matter
To answer the first question about elliptical galaxies, we need to look at the statements provided:
1. They include the universe's largest galaxies.
2. They typically contain very little gas and dust.
Based on these statements, we can conclude that both statements describe elliptical galaxies.
Now let's move on to the second question about the appearance of spiral galaxies:
1. Some have a band of stars and materials through their middle, but others do not.
2. They vary in how tightly their arms are wound.
From these statements, we can conclude that both statements describe the variations in the appearance of spiral galaxies.
Finally, let's tackle the third question about the component that makes up the bulk of all galaxies:
The correct answer is dark matter. This conclusion doesn't require any additional explanation or steps.
In summary:
- Elliptical galaxies are the universe's largest galaxies and contain little gas and dust.
- Spiral galaxies can have or not have a band of stars and materials through their middle, and their arms can be loosely or tightly wound.
- Dark matter is the component that makes up the majority of all galaxies.
Which statements describe elliptical galaxies?
- They include the universe's largest galaxies.
- They typically contain very little gas and dust.
How does the appearance of spiral galaxies vary?
- Some have a band of stars and materials through their middle, but others do not.
- They vary in how tightly their arms are wound.
What is the approximate number of stars in a typical galaxy?
- Approximately 100 billion.
Which component makes up the bulk of all galaxies?
- Dark matter.
Correct statements about elliptical galaxies:
- They typically contain very little gas and dust.
Correct statements about spiral galaxies:
- Some have a band of stars and materials through their middle, but others do not.
- They vary in how tightly their arms are wound.
For the statement "They include the universe's largest galaxies," it is not specifically true that all elliptical galaxies are the largest. While some elliptical galaxies can indeed be very large, there are also other types of galaxies, such as giant spiral galaxies, that can be even larger.
The number "100 billion" does not seem to fit within the given context of the question, so it cannot be determined how it relates to galaxy types.
The statement "Dark matter" is not a component that makes up the bulk of all galaxies. Dark matter is a hypothetical form of matter that is thought to make up a significant portion of the universe's mass, but its exact nature and properties are not yet fully understood.