What is a chemical reaction and how can we identify them?
In this lesson, we will find out what happens during a chemical change, look at some examples of chemical changes and practise representing chemical changes using word equations.
What is a chemical reaction and how can we identify them?
In this lesson, we will find out what happens during a chemical change, look at some examples of chemical changes and practise representing chemical changes using word equations.
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Lesson details
Key learning points
- Know what a chemical reaction is
- Describe signs that a chemical reaction has taken place
- Give examples of chemical reactions
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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5 Questions
Q1.
Liquids can flow because ...
The particles are not arranged in a regular pattern.
The particles can move freely in all directions.
The particles have lots of energy.
Q2.
When water becomes ice the process is called ...
Boiling
Condensing
Melting
Q3.
Burning paper is an example of a physical change.
True
Q4.
Sugar dissolving in water is an example of a physical change.
False
Q5.
A ceramic bowl smashing is not an example of a physical change.
True
5 Questions
Q1.
A chemical reaction involves a change in the arrangement of particles.
True
Q2.
A match burning is an example of a chemical reaction.
False
Q3.
Salt dissolving is an example of a chemical reaction.
True
Q4.
What is a reactant?
The energy gained by particles when a substance is heated.
The substances that form in a chemical reaction.
The substances that stay the same in a chemical reaction.
Q5.
What is a product?
The energy gained by particles when a substance is heated.
The substances at the start of a chemical reaction.
The substances that stay the same in a chemical reaction.