Unit 4 - Our Universe

At around 15,000,000 degrees Celsius, hydrogen atoms come together to form helium and release energy. This process is called:

• supernova

• pulsar

• nuclear fusion

• nuclear fission

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

As gravity pulls gas and dust in a nebula into a sphere that becomes denser and hotter, but before fusion begins, it is called a(n)

• white dwarf

• red dwarf

• supergiant

• protostar

What type of star would be shown at the lower right end of the main sequence on the H-R diagram?

• white dwarf
• red dwarf
• supergiant
• protostar

A gigantic explosion that occurs at the end of a massive stars' life.

• pulsar

• red giant

• supernova

• black hole

Tags

NGSS.HS-ESS1-3

A star that expands and cools once it runs out of hydrogen.

• pulsar

• black hole

• red giant

• supernova

Tags

NGSS.HS-ESS1-3

A massive and dense object from which not even light can escape.

• black hole

• supernova

• pulsar

• red giant

The color of a star depends on its

• composition

• temperature
• shape
• magnitude

What color are the hottest stars?

• red
• yellow
• orange
• blue

The distance light travels in a year.

• parallax

• absolute magnitude

• apparent magnitude

• light year

All stars begin their life in a

• Main Sequence
• Nebula
• Protostar
• Black Dwarf

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3