Gasoline (petrol)
4 marks · NormalState the main use of gasoline (petrol).
Describe how gasoline is used in this application.
Give one reason why gasoline is suitable for this use.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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(a) Used as a fuel for cars / vehicles
(b) Gasoline is burned in a car engine to release energy needed for movement (transport); It is vaporised and mixed with air, then combusted in the engine.
(c) It burns easily / provides a lot of energy per volume / is easy to handle and store
Common mistakes: Confusing gasoline with refinery gases; Giving unrelated uses (e.g., heating, cooking)
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · States that gasoline is used as a fuel for cars (vehicles).
B2 (b) · 1 mark · Describes that gasoline is burned/combusted in engines to provide energy for movement.
B3 (b) · 1 mark · Mentions that gasoline is mixed with air and burnt to power the vehicle (vaporised and combusted, or similar clear step).
B4 (c) · 1 mark · Gives one valid reason for suitability (e.g. burns easily, releases a lot of energy, easy to store or handle).
Worked solution
a) Gasoline (petrol) is mainly used as a fuel for cars. b) Gasoline is vaporised and mixed with air in the engine, then burned to produce energy. This energy moves the car. c) Gasoline is suitable for this use because it burns easily and provides a lot of energy per unit volume.