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Year 8

Reducing emissions from transport

I can describe how to travel in ways that reduce greenhouse gas emissions

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New
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Year 8

Reducing emissions from transport

I can describe how to travel in ways that reduce greenhouse gas emissions

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Lesson details

Key learning points

  1. Cars use more energy to travel 100 km if they are heavier or travel at higher speeds.
  2. Cars use less energy if their tyres are inflated to the correct air pressure
  3. Walking and cycling regularly improve a person’s physical health
  4. Well-planned infrastructure for cycling, walking and public transport make it easier and safer to travel without a car

Keywords

  • Efficiency - the fraction of energy supplied to an object or system that is usefully transferred

  • Streamlined - shaped to reduce drag forces

  • Infrastructure - the set of facilities and systems that serve an area

Common misconception

Driving at a high speed does not have much effect on the amount of energy a car uses for a whole journey.

Discuss the idea that the faster a car travels, the greater the drag force pushing back on the car. A good analogy is walking slowly or quickly through water in a swimming pool - it's much harder to walk quickly because of the increased drag.


To help you plan your year 8 science lesson on: Reducing emissions from transport, download all teaching resources for free and adapt to suit your pupils' needs...

For task B, pupils could be provided with a map of the school and local area on which they could draw their ideas, rather than describe them in prose.
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This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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6 Questions

Q1.
What is the drag force on a moving bus?
The force of the road on the bus.
The force of the bus on the road.
Correct answer: The force of the air on the bus.
The force of the bus on the air.
Q2.
Which direction does the drag force act on a moving car?
In the direction of the wind.
Opposite to the direction of the wind.
In the direction the car is moving in.
Correct answer: Opposite to the direction the car is moving in.
Q3.
Why does a moving car have less drag than a bus moving at the same speed?
Fewer people are travelling in the car.
The car has less mass than the bus.
Correct answer: The car is a smaller size than the bus.
The car has narrower tyres than the bus.
Q4.
Which statement about the drag acting on a car is correct?
Correct answer: Drag on the car increases as it speeds up.
Drag on the car does not change as it speeds up.
Drag on the car decreases as it speeds up.
Q5.
What word is used to describe cars that are shaped to reduce drag?
Correct Answer: streamlined, streamline, streamlining
Q6.
How do electric vehicles help to reduce greenhouse gas emissions?
Generating electricity does not produce greenhouse gases.
Manufacturing an electric vehicle does not produce greenhouse gases.
Correct answer: electric vehicles do not produce greenhouse gases as they travel.
electric vehicles are much lighter than petrol vehicles.

6 Questions

Q1.
Two petrol cars make the same journey. The one that uses less petrol is more what?
Correct Answer: efficient, efficiency
Q2.
What helps an electric car to use less charge to make a journey?
Carrying a heavy load.
Carrying an extra passenger.
Correct answer: Driving smoothly at a moderate speed.
Driving as quickly as speed limits allow.
Q3.
What is not a benefit of driving a petrol car at 60 mph on a motorway, instead of at 70 mph?
reduces greenhouse gas emissions
reduces pollution
saves money
Correct answer: saves time
Q4.
What is the best definition of infrastructure?
the buildings in a town or city
Correct answer: the set of facilities and systems that serve an area
the road network connecting towns and cities
the public transport system across the country
Q5.
What infrastructure can encourage fewer journeys by car?
Correct answer: bicycle lanes
Correct answer: reliable public transport
roundabouts
Correct answer: wider roads
Q6.
What infrastructure does not encourage more journeys by bicycle?
cycle lanes separated from other traffic
Correct answer: roundabouts
secure bicycle parking
wider cycle lanes