Science Review - Galaxies

Question 1

Spiral Galaxies

Answer 1

• Disk-shaped
• Contain a central bulge of older stars
• Surrounded by a “halo” of stars
• Youngest type of galaxy

Question 2

Elliptical Galaxies

Answer 2

• Ovalur and no spiral arms (no internal structure)
• Little gas/dust no new stars
• Believed to be formed when two or more galaxies collide

Question 3

Irregular Galaxies

Answer 3

• No identifiable shape
• Chaotic in appearance
• Large gas/dust and creating intense young star formation

Question 4

What does CMBR stand for?

Answer 4

Cosmic
Microwave
Background
Radiation

Question 5

Red Shift

Answer 5

Coming away from us

Question 6

Blue Shift

Answer 6

Coming towards us