Unit 5 Test Review - Universe, Stars, Galaxies, Ems

The most common chemical element in a new star is

• Hydrogen

• Helium

• Carbon

• Sodium

To measure the distance to a nearby star, an astronomer would use

• Visible light

• Quasars

• Light year

• A spectrograph

True or False, According to the big bang theory, the universe has been growing for 10-15 billion years.

• True

• False

True or False, a light-year is an unit of distance.

• True

• False

What is the name of the galaxy in which we live?

• Earth

• Andromeda

• Milky Way

• Solar System

What type of galaxy is the Milky Way?

• Spiral galaxy

• Elliptical galaxy

• Irregular galaxy

When the color of stars change from violet/blue to red, this is called _____

• blue shift

• aging stars

• red shift

• red star

What type of galaxy is this?

• Spiral galaxy

• Elliptical galaxy

• Irregular galaxy

What type of galaxy is composed of older, low-mass stars and contains little dust?

• Spiral galaxy

• Elliptical galaxy

• Irregular galaxy

What type of galaxy lacks structure and shape?

• Spiral galaxy

• Elliptical galaxy

• Irregular galaxy