GCSE - Gcse Biology - Unit 4 - Key/Independent Variable Solution - MCQGeeks.com

Q.1.

The key variable is...

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the variable that is changed by the experimenter
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the variable that is controlled by the environment of the experiment
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the variable that is measured by the experimenter
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the variable that is always decreased in value

Q.2.

The key variable is the factor we are...

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changing
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keeping constant
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ignoring
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measuring

Q.3.

Controlled variables are always kept...

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the same
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different
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larger
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smaller

Q.4.

In graphs, the key variable is always plotted on the...

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x axis
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y axis
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both axes
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does not matter

Q.5.

I think that as we increase the temperature, the number of germinating seeds will increase. The dependent variable is ...

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temperature
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number of seeds
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increase
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decrease

Q.6.

If we change the value of a factor affecting the experiment, it must be the ...

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key variable
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a controlled variable
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dependent variable
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an anomaly

Q.7.

You decide these values at the planning stage of your investigation.

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Dependent variable only
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Control variables only
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Dependent and control variables
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Key independent variable and control variables

Q.8.

I think that as the mass increases, the speed will decrease. Which is the key variable?

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Mass
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Speed
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Increase
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Decrease

Q.9.

A variable in an experiment is...

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a factor we can change or measure or control
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a factor in the environment
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something which changes
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something which stays the same

Q.10.

Uncontrolled variables may make the results...

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unreal
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accurate
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unreliable
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true