Question

With which type of galaxy is a small galaxy most likely to merge? Select the two correct answers. (1
a nearby galaxy
• a much larger galaxy
• • an equal-sized galaxy
• a tast-moving galaxy
Which factor is essential to the initial formation of galaxies, for either of the theories describing galaxy evolution? (1
• Massive gas and dust clouds collapse.
• Small lumps of material merge into larger clumps.
• Gravity acts on existing material, shaping it into a new form.
• The force of orbiting stars generates collisions.
Which characteristics are considered most typical of an old galaxy in decline? (1 point)
• low gas content, little star formation
• spiral, abundant planets present
• shrinking in size, high dust content
• very bright, relatively small

Answer 1

1. **With which type of galaxy is a small galaxy most likely to merge?**
- a nearby galaxy
- a much larger galaxy

2. **Which factor is essential to the initial formation of galaxies, for either of the theories describing galaxy evolution?**
- Massive gas and dust clouds collapse.

3. **Which characteristics are considered most typical of an old galaxy in decline?**
- low gas content, little star formation