Stellar Evolution

Which factor determines the evolution of a star?

• Mass

• Gravity

• Radius

When do we say a star is born?

• when fusion of hydrogen to helium begins

• when fusion of helium to hydrogen begins

• when fusion of helium to carbon begins

• when their first audition goes well

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

the Period-Luminosity Law states: the more slowly a star pulsates the _________ its luminosity.

• larger

• smaller

• most varied

In which phase does a star spend most of its life?

• proto-star

• main sequence

• red giant

Tags

NGSS.HS-ESS1-1

Which is the process of combining smaller elements into larger elements?

• nucleosysthesis

• proton proton chain

• CNO cycle

• triple alpha process

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

How do astronomers test models of stellar evolution?

• by plotting actual stars on the HR diagram

• by plotting theoretical stars based upon our Sun

• by recording the properties of stars over time

The Sun formed from the collapse of a cold

• interstellar cloud

• red giant

• planetary nebula

• galaxy

The collapse of the cloud that formed the Sun too approximately...

• 1-10 million years

• 100 million years

• 1-10 billion years

______ is the most significant force that drives the evolution of a star.

• Gravity

• Mass

• Magnetism

• Luminosity

Tags

NGSS.HS-ESS1-1

The main source of energy in main sequence stars is..

• the fusion of hydrogen into helium

• the triple alpha process

• chemical reactions of hydrogen and helium

• love

Tags

NGSS.HS-ESS1-1