Y13 Fission Reactions Quiz

In the core of a stable star, what process occurs with hydrogen atoms?

• Nuclear fission

• Chemical reaction

• Nuclear fusion

• Radioactive decay

Fusion is best defined as:

• The splitting of a large nucleus into smaller nuclei.

• The joining of two small nuclei to produce a larger nucleus.

• The release of energy through chemical reactions.

• The absorption of energy by a nucleus.

Match the following forces with the scenarios they must be overcome:

• To hold protons together in a nucleus

• Weak nuclear force

• For two nuclei to fuse

• Strong nuclear force

• To change the type of a quark

• Gravitational force

• To lift an object off the ground

• Electromagnetic force

What is the primary reason energy is released in a fusion reaction?

• The total mass of the products is greater than the total mass of the reactants.

• The total mass of the products is less than the total mass of the reactants.

• The number of protons increases during the reaction.

• The number of neutrons decreases during the reaction.

Which of the following statements is true regarding the binding energy per nucleon in fusion reactions?

• The binding energy per nucleon decreases.

• The binding energy per nucleon remains constant.

• The binding energy per nucleon increases.

• The binding energy per nucleon is irrelevant.

The binding energy per nucleon increases when two small nuclei undergo a fusion reaction. Which option describes this correctly?

• The binding energy per nucleon decreases when two small nuclei undergo a fusion reaction

• The binding energy per nucleon remains the same when two small nuclei undergo a fusion reaction

• The binding energy per nucleon increases when two small nuclei undergo a fusion reaction

• There is no binding energy per nucleon after fusion reactions

What is the outward acting force that balances the inward pull of gravity in a star?

• Electromagnetic force

• Nuclear force

• Gravitational force

• Radiation pressure

What is the name of the stage in the life cycle of a star where inward and outward forces are in equilibrium?

• Nebula

• Protostar

• Main Sequence Star

• Red Giant

What is the correct order of stellar evolution for a low-mass star?

• Nebula -> Main Sequence -> Red Giant -> White Dwarf

• Red Giant -> Main Sequence -> Nebula -> White Dwarf

• Nebula -> Red Giant -> Main Sequence -> White Dwarf

• Main Sequence -> Nebula -> Red Giant -> White Dwarf

What happens to a high-mass star at the end of its life cycle?

• It becomes a white dwarf.

• It becomes a black dwarf.

• It becomes a supernova, neutron star, or black hole.

• It becomes a red giant.