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Command Words for GCSE Sciences



GCSE Science Examination Command Words and Examples to Illustrate
Below each explanation are examples, with answers in blue, which would gain full marks.

Calculate
Candidates should use numbers given in the question to work out the answer. They should always
show their working, as it…

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Command Words for GCSE Sciences



Example: Chemistry

2 A drug amphetamine has the formula C9H13N

The relative molecular mass (Mr) of amphetamine is 135.

Calculate the percentage by mass of nitrogen in amphetamine.

Relative atomic mass: N = 14 C=12 H=1

Mass of N 1 x 14 = 14 .............................................................................................................…

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Command Words for GCSE Sciences



Compare the advantages of phytomining with the traditional method. Use the information given in the
passage and the diagram.

The advantages of phytomining are that it would take less energy than the traditional method and it
will be carbon neutral because the plants will take…

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Command Words for GCSE Sciences



Example: Physics

6 Marbles inside a box can be used as a model for the particles in a solid, a liquid or a gas.




Complete the following sentences using words from the box. Each word can be used once, more
than once or not at…

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Command Words for GCSE Sciences



Describe
Candidates should recall some facts, events or process in an accurate way - for example an
experiment they have done. They may need to give an account of what something looked like, or
what happened, eg a trend in some data.

Example: Biology

7…

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Command Words for GCSE Sciences



Example: Physics

8 A star goes through a life cycle.

Describe the life cycle of a star like the Sun.

In the beginning dust particles and gases are pulled together by the force of gravity. As the atoms of
hydrogen gas are forced together the…

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Command Words for GCSE Sciences



Evaluate

Candidates should use information supplied or their own knowledge and understanding to consider
the evidence for and against and draw conclusions.
This goes further than "compare". For example, they may be given a passage to read and told to
"Evaluate the benefits of using…

Page 8

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Command Words for GCSE Sciences



Example: Chemistry

10 This information about biodiesel was printed in a magazine.

Almost all of the crops we eat can be converted into fuel for cars.
Vegetable oils can be used as biodiesel. Diesel from crude oil is called fossil diesel.
When either biodiesel or…

Page 9

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Command Words for GCSE Sciences



Explain
Candidates should make something clear, or state the reasons for something happening.
The points in the answer must be linked coherently and logically.
The answer should not be a simple list of reasons.

Example: Biology

11 Some students investigated the effect of temperature on…

Page 10

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Command Words for GCSE Sciences



Example: Chemistry
12 A mixture of the olive oil, water and egg yolk was shaken and left to stand. The olive oil and water do
not separate.

The diagram shows a simple model of how a stable mixture of olive oil and water is produced…

Comments

Emma Simmonds

thanx khadija

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