P3e

Question 1

How is size linked to the fuel consumption of cars

Answer 1

• size and design of car engines determine how powerful they are
• larger, ore more powerful engines transfer more energy from its fuel every second, so the higher the fuel consumption

Question 2

What things affect fuel consumption?

Answer 2

• mass of car
• speed car is driven at
• size of engine
• road conditions affects how much you need to break, affecting fuel consumption
• driving style: faster accelerations need more energy and so more fuel, frequent braking and acceleration increases fuel consumption

Question 3

What is fuel consumption?

Answer 3

-fuel consumption of a car is usually stated as the distance travelled using a certain amount of fuel

Question 4

What are the disadvantages of fossil fuel for cars?

Answer 4

• environmental problems like acid rain and climate change (caused by greenhouse effect)
• non-renewable (run out one day)

Question 5

What are the disadvantages of biofuel for cars?

Answer 5

• give off carbon dioxide when burnt

- pollution through prouction

Question 6

What are the advantages of biofuel for cars?

Answer 6

• renewable (won’t run out)
• no overall increase in carbon dioxide levels in the atmosphere as plants are grown to produce biofuel
• not as much pollution released as fossil fuels

Question 7

What are the disadvantages of electric cars?

Answer 7

• electricity to charge car most likely comes from power stations , so they pollute, as most power stations currently burn fossil fuels to produce electricity
• expensive to make and buy
• limited performance compared to ordinary cars
• limited charging places

Question 8

What are the advantages of electric cars?

Answer 8

• don’t release pollution at the point of use
• quite
• can be made better by giving the vehicles solar panels to generate electricity, no pollution produced at all

Question 9

Why doe open windows increase fuel consumption?

Answer 9

• open windows increase drag (air resistance/friction)
• because energy from fuel is needed to work against friction
• so fuel consumption increases

Question 10

What gases are released when fossil fuels are burnt?

Answer 10

• carbon dioxide
• nitrogen dioxide
• water vapour