The more reactive element takes the place of a less reactive element in a compound.

Exothermic chemical reaction is a type of reaction in which energy is transferred from the reaction to the surroundings e.g. combustion.

A prediction that is supported with an explanation.

Sums up what has been found out during the investigation. It always refers to both the independent and dependent variables.

A chart showing solid columns; to present data usually used when one variable is discrete.

Energy changes: displacement practical

Combined science

In the Rate of Reaction unit, pupils will build on their understanding of energy changes to learn about the factors that influence the rate of chemical reactions.

In the Fuels and Energetics unit, pupils learned about energy changes during chemical reactions, including exothermic and endothermic reactions.

Energy changes in reactions

A more reactive element replaces a less reactive one

A less reactive element replaces a more reactive one

The reaction involves no change in the elements

What occurs during a displacement reaction?

What does an exothermic reaction typically result in?

Subtract initial temperature from final temperature 

Subtract initial volume from final volume

How do you calculate the energy change in a reaction?

Which substance would be displaced if zinc is added to copper sulfate solution?

What is the correct symbol equation for the displacement reaction of zinc with copper sulfate?

Which element is more reactive, magnesium or copper?

Which type of data is best represented by a bar chart?

An observation made during the experiment

The variable that is dependent on other factors

What is an independent variable in an experiment?

What is a dependent variable in an experiment?

To ensure the results are reliable and valid

Why is it important to control variables in an experiment?

Starter Quiz