The Lifecycle of a Star

During a school science project, Sofia and Daniel are learning about stars. What is the initial stage in the lifecycle of a star?

• White dwarf

• Stellar nebula

• Red giant

• Black hole

Emily and Amelia are observing a cloud of gas and dust in space. What force causes the gas and dust to spiral together to form a protostar?

• Electromagnetic force

• Nuclear force

• Gravity

• Friction

Tags

NGSS.HS-PS2-4

Harper and Anaya are discussing the temperature at which nuclear fusion starts in a star. At what temperature does this process begin?

• Thousands of degrees Celsius

• Millions of degrees Celsius

• Hundreds of degrees Celsius

• Billions of degrees Celsius

Tags

NGSS.HS-ESS1-1

Lucas is studying the lifespan of main-sequence stars for his astronomy project. How long can these stars exist?

• 1 million to 1 billion years

• 10 million to 10 billion years

• 100 million to 100 billion years

• 1 billion to 10 billion years

Tags

NGSS.HS-ESS1-3

During a classroom discussion, Charlotte asked, 'What do smaller stars become after the red giant phase?'

• Black holes

• Neutron stars

• White dwarfs

• Supernovae

Grace is studying the lifecycle of stars in her astronomy class. She wants to know, what is the final stage of a small star's lifecycle?

• Black dwarf

• Neutron star

• Black hole

• Supernova

During a science class, Arjun asked, 'What event occurs when a massive star explodes?'

• Formation of a protostar

• Creation of a black dwarf

• Supernova

• Formation of a stellar nebula

During a science class, Mira asked, 'What can the remnants of a supernova form?'

• White dwarfs or red giants

• Neutron stars or black holes

• Protostars or main-sequence stars

• Stellar nebulas or red dwarfs

What is the role of gravity in the formation of a new solar system?

• It repels gas and dust

• It causes gas and dust to spiral together

• It cools down the protostar

• It stops nuclear fusion

Tags

NGSS.HS-PS2-4

Liam is studying astronomy and learns about different stages of star formation. What is a protostar?

• A star that has exploded

• A star in its final stage

• A developing star formed from gas and dust

• A star that has stopped nuclear fusion