

RRR-Chemical Reactions
Presentation
•
Science
•
7th - 9th Grade
•
Medium
Sammia Bano
Used 14+ times
FREE Resource
7 Slides • 12 Questions
1
RRR-Chemical Reactions
Read through the material in the slides and answer the questions

2
Learning Outcomes
To know that for combustion to take place heat, fuel and oxygen is needed
To know that combustion is a chemical reaction
3
Combustion
Combustion means burning. Three are 3 things which are needed for burning to take place. They are:- heat, fuel and oxygen
Combustion is a chemical reaction. This means new products are made and the reaction is irreversible.
4
Multiple Select
Which 3 things are needed for a combustion reaction?
fuel
carbon dioxide
heat
oxygen
5
Fill in the Blanks
Combustion is a
Type answer...
6
Multiple Choice
Name the gas which is needed for a combustion reaction?
oxygen
hydrogen
carbon dioxide
air
7
Coal is a fuel
This can be summarised :-
hydrocarbon + oxygen ➡️ carbon dioxide + water
The reactants are found on the left hand side of the equation
The reactants are hydrocarbon and oxygen
The products are found on the right hand side
The products of combustion are carbon dioxide and water
8
Multiple Choice
What is produced when hydrocarbons are burnt
oxygen
carbon dioxide and water
water
carbon dioxide
9
Multiple Select
Reactants are written on which side of an equation?
left
right
middle
10
Multiple Select
Products are found on which side of the equation?
left
middle
right
11
Fossil Fuels
Coal, oil and gas are called fossil fuels. These fuels are non-renewable. This means they will run out. Fuels store chemical energy. When the fuel is burnt lots of thermal energy and some light energy is transferred to the surroundings.
Methane is used in gas cookers and bunsen burners. Methane is a hydrocarbon. Hydrocarbons are made up of hydrogen and carbon particles only.
12
Multiple Select
Choose 3 answers "Methane is a......"
fossil fuel
hydrocarbon
gas
liquid
13
Testing for carbon dioxide
When a fuel is burnt, carbon dioxide is produced
This gas can be bubbled into limewater
Carbon dioxide causes limewater to turn cloudy
14
Multiple Select
What chemical is used to test for carbon dioxide?
limewater
acid
water
petrol
15
When carbon dioxide gas is put into limewater it turns cloudy or milky.
16
Multiple Select
What gas turns limewater cloudy?
oxygen
water
methane
carbon dioxide
17
Multiple Select
What type of energy do fuels store?
thermal
kinetic
light
chemical
18
Multiple Choice
Name the fossil fuel
solar
oil
hydroelectric
wind
19
Multiple Select
How can fossil fuels be described?
renewable
dangerous
non-renewable
solids
RRR-Chemical Reactions
Read through the material in the slides and answer the questions

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