Astronomy - universe and stars

Characteristics used to classify stars include

• distance, size, and color.
• size, distance, and brightness.
• color, brightness, and distance.
• size, brightness, and temperature.

What color are the coolest stars?

• blue-white
• yellow
• red
• orange

The Hertzsprung-Russell diagram shows that main-sequence stars

• are mostly hot and dim.
• are mostly cool and bright.
• increase in brightness as they increase in temperature.
• decrease in brightness as they increase in temperature.

What color of star is the hottest?

• Blue
• Red
• Yellow
• Orange

Tags

NGSS.MS-PS3-4

The color of a star depends on its

• size
• temperature
• shape
• magnitude

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A very bright star can seem to be dimmer because it is 

• further away
• cooler in temperature
• very close
• batteries are dying

Stars are made of mostly which two gases?

• Hydrogen and Helium

• Hydrogen and Oxygen

• Hydrogen and Nitrogen

• Hydrogen and Carbon

Tags

NGSS.HS-ESS1-3

Stars give off heat and light in a process called ___________.

• nuclear fusion

• supernova

• luminosity

• spectroscopy

Tags

NGSS.HS-ESS1-1

In the process of nuclear fusion, hydrogen atoms combine to form ___________ atoms.

• helium

• carbon

• nitrogen

• oxygen

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

NGSS.HS-PS1-8

Billions of stars are held together in groups called __________.

• galaxies

• solar systems

• planets

• comets

Tags

NGSS.MS-ESS1-2