Answers Crowley Credit Recovery Physics BUnit Test

Fission and Fusion Answers

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The process in which the nucleus of an atom splits into two lighter atoms, releasing a large amount of energy, is nuclear ______

Fusion

Fission

Radiation

Energy

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Which are advantages of using nuclear reactors to generate electricity? Select 3 options.

Nuclear power produces no hazardous byproducts.

Nuclear power has a high output.

Nuclear power uses nonharmful fuel.

Nuclear power is readily available.

Nuclear power produces relatively low carbon dioxide emissions.

Gazala makes a graphic organizer to compare nuclear fission and nuclear fusion.

X: Provides household electricityY: Has rods containing uranium

X: Provides household electricityY: Requires high temperature and pressure

X: Converts mass into energyY: Does not produce usable amounts of energy

X: Converts mass into energyY: Is controlled by neutron absorption

Which equation represents mass-energy equivalence?

E = m2c

E = mc2

E = (mc)2

E = mc

The starting materials in a nuclear change have a total mass of 2.3465 × 10–27 kg. After the change, the resulting materials have a mass of 2.3148 × 10–27 kg.How much energy was released during the change?

2.85 × 10–12 J

2.08 × 10–10 J

2.11 × 10–10 J

8.56 × 10–4 J

Which equation represents mass-energy equivalence?

E = m2c

E = mc2

E = (mc)2

E = mc

What conditions are required for nuclear fusion?

high temperature and low pressure

high temperature and high pressure

low temperature and high pressure

low temperature and low pressure

What is the energy equivalent of an object with a mass of 2.5 kg?

5.5 × 108 J

7.5 × 108 J

3.6 × 1016 J

2.25 × 1017 J

Trudy writes an expression to calculate the mass defect of a carbon-14 nucleus using the symbols in the table.

(6mp + 8mn) – mc – 14

(8mp + 6mn) – mc – 14

mp + mn – mc – 14

6mp + 8me – mc – 14

Carla sees an equation that models a nuclear change.

nuclear fission, because the equation shows two hydrogen nuclei combining to form a helium nucleus

nuclear fission, because the equation shows a hydrogen nucleus breaking apart and releasing a neutron

nuclear fusion, because the equation shows two hydrogen nuclei combining to form a helium nucleus

nuclear fusion, because the equation shows a hydrogen nucleus breaking apart and releasing a neutron

The nuclear equation is incomplete.

Superscript 12 Subscript 6 Baseline M g

Superscript 11 Subscript 5 Baseline B

Superscript 11 Subscript 5 Baseline N a

Superscript 12 Subscript 6 Baseline C

The diagram shows a model of a nuclear change.

nuclear fission, because nuclei combine

nuclear fission, because a nucleus breaks apart

nuclear fusion, because nuclei combine

nuclear fusion, because a nucleus breaks apart

How are nuclear reactions used to meet the world’s energy needs?

Both fusion and fission are used to generate electricity, but more fission reactors than fusion reactors are in use.

Fission reactors are used to generate electricity, but fusion is not yet practical enough to be used.

Both fusion and fission are used to generate electricity, but more fusion reactors than fission reactors are in use.

Fusion reactors are used to generate electricity, but fission is not yet practical enough to be used.

What is the energy equivalent of an object with a mass of 2.5 kg?

5.5 × 108 J

7.5 × 108 J

3.6 × 1016 J

2.25 × 1017 J

What are the starting materials for nuclear fission?

two small nuclei

two large nuclei

a neutron and a large nucleus

a neutron and a small nucleus

The nuclear equation is incomplete.

Superscript 138 Subscript 54 Baseline X e

Superscript 139 Subscript 54 Baseline X e

Superscript 119 Subscript 54 Baseline X e

Superscript 138 Subscript 52 Baseline T e

Carla sees an equation that models a nuclear change.

nuclear fission, because the equation shows two hydrogen nuclei combining to form a helium nucleus

nuclear fission, because the equation shows a hydrogen nucleus breaking apart and releasing a neutron

nuclear fusion, because the equation shows two hydrogen nuclei combining to form a helium nucleus

nuclear fusion, because the equation shows a hydrogen nucleus breaking apart and releasing a neutron

Which would most likely cause a decrease in the rate of energy production in a fusion nuclear reactor?

a drop in the temperature in the reactor

an increase in the number of neutrons in the reactor

an increase in the amount of nuclear fuel used in the reactor

a drop in the number of reactions that involve the splitting of nuclei