Estrella

Stars generate energy through nuclear reactions where atoms fuse to form heavier elements.

What is the primary source of energy in stars?

• Gravitational pull

• Nuclear reactions

• Chemical reactions

• Solar flares

Which process involves atoms combining to form heavier elements?

• Fission

• Fusion

• Combustion

• Evaporation

What happens during nuclear reactions in stars?

• Atoms remain unchanged

• Atoms evaporate

• Atoms fuse to form heavier elements

• Atoms split into smaller parts

Which of the following is NOT a result of nuclear reactions in stars?

• Creation of light

• Release of energy

• Cooling of the star

• Formation of heavier elements

What is the role of nuclear reactions in the lifecycle of a star?

• They cool down the star

• They provide energy and form heavier elements

• They cause the star to shrink

• They have no significant role