Stars, Galaxies, and the Universe

Scientists think that the universe will ...

• end someday

• expand forever

• eventually shrink

• expand and shrink on a regular basis

Tags

NGSS.HS-ESS1-2

What does a star's color indicate?

• its size

• its age

• its temperature

• its shape

Tags

NGSS.HS-PS4-3

The H-R diagram shows the relationship between a star's surface temperature and its ...

• absolute magnitude

• apparent magnitude

• size

• distance

Which of the following is the hottest?

• a red giant superstar

• a small, white dwarf star

• a main-sequence yellow star

• a main-sequence blue star

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

According to the big bang theory, the universe is about ...

• 470 billions years old

• 500 billions years old

• 4.7 billions years old

• 13.7 billions years old

Tags

NGSS.HS-ESS1-2

Scientists think that the Milky Way probably is ...

• an irregular galaxy

• an elliptical galaxy

• a spiral galaxy

• a nebula

Tags

NGSS.MS-ESS1-2

Which of the following is the largest?

• a nebula

• a galaxy

• a neutron star

• a globular cluster

On what part of the modern H-R diagram do cool, bright, red stars appear?

• top, right

• top, left

• bottom, right

• bottom, left

What is one way scientists use to calculate the age of the universe?

• measure the distance from Earth to nearby stars

• measure the distance from Earth to various galaxies

• measure the distance from Earth to the sun

• measure the size of various galaxies

Tags

NGSS.HS-ESS1-2

Why do black lines appear on the an absorption spectrum?

• Black lines appear where colors of light are absorbed by a star's atmosphere.

• Black lines appear where a star's atmosphere emits different colors of light.

• Black lines appear to indicate colors not found in a star.

• Black lines appear where gases are absorbed by a star's atmosphere.

Tags

NGSS.HS-PS4-3