Fuel reacts with oxygen to release energy and requires fuel, oxygen and heat to start the reaction.

Is a type of combustion where substances react with oxygen and produce visible flames.

Made up of two or more atoms chemically bonded together. These are usually non-metal atoms.

A substance that releases its stored energy when it undergoes combustion.

A type of reaction in which oxygen bonds to elements of the reactants.

Chemical reactions: combustion

Science

Characteristics of chemical reactions

Conservation of mass and balanced symbol equations

Chemical reactions: oxidation

Chemical reactions: decomposition

Chemical reactions: precipitation

In the Acids and Bases unit, pupils will build on their understanding of chemical reactions to learn about the properties of acids, bases, alkalis, and the neutralisation reaction.

In the Atoms, Elements and Compounds unit, pupils learned about atoms, elements, and compounds and how particles reorganise in a chemical reaction.

This unit covers the conservation of mass in changes of state and chemical reactions, including atom rearrangement. It also focuses on representing reactions with formulae and equations, exploring combustion, decomposition, and displacement, and distinguishing chemical from physical changes.

Understanding chemical reactions

Physical activity and equipment requiring safe use

A reaction where substances react with oxygen to release energy.

A process where substances dissolve in water.

Burning is a type of combustion where substances react with oxygen and produce visible {{}}.

Which of the following is often formed in chemical reactions if oxygen and carbon atoms are present?

{{}} is often formed in chemical reactions if oxygen and hydrogen atoms are present.

A {{}} is a substance that releases stored energy during combustion.

When there is limited oxygen present during a combustion reaction, carbon monoxide will be produced (not carbon dioxide). What is the formula for carbon monoxide?

Combustion requires fuel, {{}}, and an initial source of energy, usually heat, to start the reaction.

Particles are closely packed and have the least energy.

Particles are loosely packed and can flow but remain close.

Particles move rapidly and are widely spaced.

Match the states of matter with their characteristics:

During a chemical reaction, the total mass of the reactants {{}} the total mass of the products.

When atoms of different elements bond together, they form a {{}}.

CO₂ contains carbon and oxygen atoms. Which of the following chemicals also contain both carbon and oxygen atoms?

Match up the word equations for the oxidation reactions:

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