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Nuclear Fission and Fusion

In this worksheet, students read about nuclear fission and fusion, and how they are used.

'Nuclear Fission and Fusion' worksheet

Key stage:  KS 4

Curriculum topic:  Physics: Atomic Structure

Curriculum subtopic:  Nuclear Fission, Nuclear Fusion and Our Sun's Energy

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

Nuclear fusion and fission are both energy releasing reactions from high power atomic bonds. The table lists their differences:

 

Nuclear fusion

Nuclear fission

Fusing of two or more small atoms into a larger one

Splitting of a large atom into two or more smaller ones

Occurs naturally in stars

Does not occur in nature

Produces few radioactive particles

Produces many highly radioactive particles

Requires high density and high temperature

Requires critical mass of substance and high speed neutrons

Requires extremely high energy

Requires little energy

Releases extremely high energy

Releases extremely high energy but much less than nuclear fusion

A type of nuclear weapon is the hydrogen bomb which uses fission to trigger fusion

A type of nuclear weapon is the well-known  atomic bomb

 
A nuclear power station uses uranium as a fuel instead of fossil fuels. The fission of uranium releases vast amounts of energy.

Apart from nuclear weapons, nuclear submarines are powered by a nuclear reactor similar to that of a nuclear power station.

Nuclear fission produces radioactive waste, which must be handled carefully to avoid causing environmental destruction.

 

What is nuclear fusion?

Splitting of one large atom into two or more smaller ones.

Fusing of two or more small atoms into a larger one.

Fusing of two or more bigger atoms into a smaller one.

What is nuclear fission?

Splitting of a small atom into two or more larger ones.

Fusing of two or more small atoms into a larger one.

Splitting of a large atom into two or more smaller ones.

Is the following statement true or false?

 

Nuclear fission occurs naturally in stars.

true

false

Which type of nuclear reaction produces more highly radioactive particles?

fusion

fission

Which type requires little energy?

fusion

fission

Which type releases extremely high energy; much more than the other?

fusion

fission

Name the bomb produced by nuclear fusion.

atomic bomb

water bomb

hydrogen bomb

Name the bomb produced by nuclear fission.

atomic bomb

water bomb

hydrogen bomb

What is the fuel used in nuclear power stations?

petroleum

kerosene

uranium

plutonium

Apart from nuclear weapons, name another use of nuclear power.

nuclear submarines

nuclear heating

nuclear ultrasound

  • Question 1

What is nuclear fusion?

CORRECT ANSWER
Fusing of two or more small atoms into a larger one.
EDDIE SAYS
Nuclear fusion is fusing of two or more small atoms into a larger one.
  • Question 2

What is nuclear fission?

CORRECT ANSWER
Splitting of a large atom into two or more smaller ones.
EDDIE SAYS
Nuclear fission is the splitting of a large atom into two or more smaller ones.
  • Question 3

Is the following statement true or false?

 

Nuclear fission occurs naturally in stars.

CORRECT ANSWER
false
EDDIE SAYS
Nuclear FUSION occurs naturally in stars, not fission.
  • Question 4

Which type of nuclear reaction produces more highly radioactive particles?

CORRECT ANSWER
fission
EDDIE SAYS
Fission produces more highly radioactive particles.
  • Question 5

Which type requires little energy?

CORRECT ANSWER
fission
EDDIE SAYS
Fission requires little energy.
  • Question 6

Which type releases extremely high energy; much more than the other?

CORRECT ANSWER
fusion
EDDIE SAYS
Fusion releases extremely high energy, which is more than the energy released by fission reactions.
  • Question 7

Name the bomb produced by nuclear fusion.

CORRECT ANSWER
hydrogen bomb
EDDIE SAYS
A hydrogen bomb is produced by nuclear fusion.
  • Question 8

Name the bomb produced by nuclear fission.

CORRECT ANSWER
atomic bomb
EDDIE SAYS
Atomic bombs are produced by nuclear fission.
  • Question 9

What is the fuel used in nuclear power stations?

CORRECT ANSWER
uranium
EDDIE SAYS
The fuel used in nuclear power stations is uranium, as it is used as a replacement to fossil fuels, which are cannot be replaced.
  • Question 10

Apart from nuclear weapons, name another use of nuclear power.

CORRECT ANSWER
nuclear submarines
EDDIE SAYS
Apart from nuclear weapons, another use of nuclear power is nuclear submarines.
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