Lola makes a list of what she learned about spiral
galaxies.
Which statement does Lola need to correct, and why?
1. They are made of bulges and arms.
2. The bulges contain mostly old red stars.
3. The arms contain mostly old blue and blue-white
stars.
4. Spiral galaxies are made of gas and dust.
Statement 1 because spiral galaxies do not have
arms.
Statement 2 because the bulges contain mostly
young red stars.
Statement 3 because the arms are made of mostly
young blue and blue-white stars.
Statement 4 because spirals galaxies contain little
to no dust.