8th 3.2 Stars Systems and Galaxies

What is made mostly of gas and are larger and hotter than planets.

• stars
• planets
• galaxies
• solar system

Astronomers can often identify a binary system that includes only one visible star by observing the effects of the dim star’s _________ on its brighter companion.

• brightness
• gravity
• density
• composition

What type of galaxies are small with many bright young stars and lots of gas and dust for star formation?

• Elliptical
• Spiral
• Irregular
• Quasar

What contains a star, the planets, and other objects that revolve around the star.

• Quasar
• Spiral
• Elliptical
• Solar System

Which galaxy is an active, young galaxy with a giant black hole at its center?

• Irregular
• Quasar
• Spiral
• Elliptical

Which galaxy shaped like a flattened ball?

• Irregular
• Quasar
• Ellipitical
• Spiral

Which galaxies have mostly old stars, without a lot of active star formation?

• Ellipitical
• Spiral
• Irregular
• quasar

What type of galaxy is the Milky Way galaxy?

• Irregular
• Spiral
• Elliptical
• Quasar

Where do new stars tend to form in a spiral galaxy?

• center
• arms