Unit 2: Stars & Galaxies Review

What type of galaxy has no special shape or form?

• a spiral galaxy

• an elliptical galaxy

• an irregular galaxy

A supernova is the explosion of a dying:

• medium-mass star

• high-mass star

• protostar

• low-mass star

Tags

NGSS.HS-ESS1-3

What type of galaxy is oval-shaped?

• a spiral galaxy

• an elliptical galaxy

• an irregular galaxy

About 90 percent of the stars in the universe, including the sun, are main sequence stars. What do all main sequence stars have in common?

• All main sequence stars are yellow like our sun.

• All main sequence stars are as bright as our sun.

• They are all undergoing fusion of helium into carbon within their cores

• They are undergoing fusion of hydrogen into helium within their cores

A large group of stars, gas, and dust is called....

• a universe

• a cluster

• a galaxy

• a solar system

A star is born in a cloud of gas and dust called a __________.

• nebula

• galaxy

• asteroid

• black hole

How are galaxies alike?

• The are all the same shape

• They have the same amount of stars

• They all have stars, gas, and dust

• They are all the same temperature

What color of star is the hottest?

• Blue
• Red
• Yellow
• Orange

Tags

NGSS.HS-ESS1-3

The H-R diagram is a graph that shows the relationship between ______________ for stars. 

• temperature and color
• temperature and brightness
• brightness and color
• distance and brightness

What color of star is the coolest?

• Red
• Yellow
• Blue
• White