Nuclear energy, Fission, and Fusion*

What is nuclear fission?

• When a nucleus splits into smaller nuclei

• When neutrons split into more neutrons

• When a nucleus becomes electrically charged

• When neutrons form a nucleus

True or false: fission requires more energy than fusion

• True

• False

What nuclear reaction occurs most often in the Sun

• Fission

• Mitosis

• Fusion

• Cell Division

Which answer(s) best describe how mass and energy are related

• They are not related

• Mass can be converted to energy

• Mass and energy always increase at the same time

• Energy can be converted into mass

True or false: All nuclei can undergo fission

• False

• True

What is nuclear fusion?

• When electrons and neutrons combine

• When smaller nuclei combine to form a larger nucleus

• When neutrons form a nucleus

• When a nucleus divides into smaller nuclei

How is a chain reaction (as it relates to fission) caused ?

• Nuclei combine until they are too heavy and are forced to split

• Electrons strike a nucleus after fission

• Neutrons form a nucleus

• Neutrons released during fission strike other nuclei

What is the critical mass (during a chain reaction)?

• The mass of all the nuclei combined

• The

  amount of material required so that each fission reaction produces one more fission reaction.

• The average mass of the neutrons involved in the reaction

• The amount of mass required for fusion to occur

True or False: The temperature must be extremely high for fusion to occur

• True

• False

Which nuclear reaction does this diagram best represent?

• Fission

• Chain reaction

• Fusion

• Kinetic energy