Cycle of Stars

A star is born when:

• nuclear fusion starts

• a nebula becomes a protostar

• gases in a nebula condense

• hydrogen is used up in fusion processes

A star that has begun nuclear fusion will last for:

• millions of years

• a few thousand years

• as long as the universe survives

• forever

Tags

NGSS.HS-ESS1-1

Main sequence stars are made primarily of which elements?

• Hydrogen only

• Helium and Carbon

• Carbon and Iron

• Hydrogen and Helium

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

A star is formed when:

• nuclear fusion begins

• a nebula becomes a protostar

• a supernova occurs

• All hydrogen is changed to helium

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

At 15,000 degrees Celsius, hydrogen atoms unite to form helium atoms and energy is released in a process called

• supernova

• pulsar

• nuclear fusion

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

NGSS.HS-PS1-8

The material to form a star comes from

• Black holes

• Nubes

• neutron clouds

• nebula

The last phase of our sun with no nuclear fusion:

• White Dwarf

• Supernova

• Red Supergiant

• Black Hole

Tags

NGSS.HS-ESS1-1

A star that has used all its hydrogen, expands and now fuses helium to carbon and oxygen

• Neutron Star

• White Dwarf

• Red Giant Star

• Black Hole

Tags

NGSS.HS-ESS1-3

What do main sequence stars use for nuclear fusion?

• Oxygen

• Hydrogen

• Carbon

• Iron

Tags

NGSS.HS-ESS1-1

sun is currently in what star stage?

• Protostar

• Nebula

• Main Sequence

• Red Giant

Tags

NGSS.HS-ESS1-1