Stellar Evolution

What is a Nebula?

• A dense pocket of hydrogen and helium

• A shockwave that causes dust to condense and collapse

• A cloud of dust that reflects light from other stars

• A breeding ground for new stars

Why do stars need Nebulas?

• To provide a breeding ground for new stars

• To reflect light from other stars

• To create shockwaves that cause dust to condense and collapse

• To consist of dense pockets of hydrogen and helium

How does the sun shine?

• Through nuclear reactions that power the Sun

• By reflecting light from other stars

• By creating shockwaves that cause dust to condense and collapse

• By fusing hydrogen atoms into helium atoms

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

What is a star?

• A luminous ball of gas held together by its own gravity

• A cloud of dust that reflects light from other stars

• A dense pocket of hydrogen and helium

• A shockwave that causes dust to condense and collapse

Tags

NGSS.HS-ESS1-3

Where do stars come from?

• Stars are born as clumps within gigantic gas clouds that collapse in on themselves

• Stars are formed through nuclear reactions that power the Sun

• Stars are created by reflecting light from other stars

• Stars are the result of shockwaves that cause dust to condense and collapse

What happens during nuclear fusion?

• Two hydrogen atoms are fused together to create an atom of helium

• Dust condenses and collapses to form a shockwave

• Light from other stars gets reflected off dust clouds

• Stars emit heat and light as a result of fusion

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

What is the main sequence of stars?

• Stars undergoing nuclear fusion and fusing hydrogen atoms into helium atoms

• Stars that reflect light from other stars

• Stars that consist of dense pockets of hydrogen and helium

• Stars that create shockwaves that cause dust to condense and collapse

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

What is the Hertzsprung-Russell Diagram?

• A diagram that shows the relationship between a star's temperature and its luminosity

• A diagram that shows the relationship between a star's mass and its luminosity

• A diagram that shows the relationship between a star's age and its luminosity

• A diagram that shows the relationship between a star's size and its luminosity

What is the temperature range for nuclear fusion to occur?

• At a minimum of 15 million degrees

• At a minimum of 10 million degrees

• At a minimum of 20 million degrees

• At a minimum of 5 million degrees

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-8

What is the source of a star's energy?

• Nuclear fusion reactions in its core

• Reflection of light from other stars

• Shockwaves that cause dust to condense and collapse

• Dense pockets of hydrogen and helium

Tags

NGSS.HS-ESS1-1