WorksheetsSimple chemical reactions
Total questions: 10
Worksheet time: 9mins
What is a physical change
no new substances
new substances
Change in apperance
I don't know
What is a chemical change?
No new substances form
New substances form
Elements combine
I don't know
Which of these are physical changes ?
Melting
electrolysis
Freezing
None of the above
When two or more substances combine to form a new substance the chemical reaction is called..
(a)
No mass is gained or lost during a chemical reaction, This is called Conservation of
(a)
The process of breaking down a substance into simpler substances by heat is called
(a)
Natural gas or fossil fuels mostly contain a gas called
(a)
Why is combustion of fuels important?
Provides energy to light up homes, schools etc and is used for transport and power machines in factories
Combustion reactions are used to heat our homes, power most cars
generate a lot of our electricity.
None of above
Examples of fossil fuels?
In combustion or Burning a substances combines with oxygen when it is ...?
(a)
