Please help! its a yes or no question but you have to add a reason to why also! Do materials in a mixture change?

Remember that the substances in a mixture have not combined chemically. They have not turned into new substances, but are still the same substances as before - they have just been physically combined. That is why we can use physical methods to separate them again.

No

Thats my thought though.

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus