Generalized Nucleosynthesis in a Massive Star

What is the process that converts hydrogen (H) to helium (He) in a massive star?

• Nuclear fusion

• Nuclear fission

• Radioactive decay

• Chemical reaction

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

How long does the conversion from helium (He) to carbon (C) take in a massive star?

• A few million years

• A few thousand years

• A few billion years

• A few hundred years

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Which element is formed at the core of a massive star during nucleosynthesis?

• Iron

• Helium

• Carbon

• Oxygen

Tags

NGSS.HS-ESS1-3

What is the duration of the core collapse in a massive star?

• less than a second

• Several years

• A few hours

• Several days

Match the stages of nucleosynthesis with their corresponding durations:

• C → O

• 1 day

• H → He

• 6 months

• He → C

• 7x10^5 years

• O → Si

• 600 years

• Si → Fe

• 7x10^6 years

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Once the hydrogen in the core of a star runs out, what element does the star begin to fuse next?

• Carbon

• Silicon

• Helium

• Iron

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Once the hydrogen and the helium in the core of a star runs out, what element does the star begin to fuse next?

• Iron

• Carbon

• Oxygen

• Silicon

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

The formation of large atomic nuclei from smaller atomic nuclei in the core of stars by nuclear fusion is called :

• nuclear fusion

• nucleosynthesis

• gravitational collapse

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Classify this process.

• Nuclear fission
• Nuclear fusion
• Alpha decay
• Beta decay

Tags

NGSS.HS-PS1-8

What is not produced when light elements undergo nuclear fusion?

• Heavier elements
• Energy 
• Lighter elements
• Light

Tags

NGSS.HS-PS1-8