Edexcel Additional Science P2a Topic 09 ... - Collins Education

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Edexcel Additional Science P2a Topic 09 ... - Collins Education Powered By Docstoc
					                                                    Safe inside
      Unit P2a
       Topic 9
      Lesson 9

Specification reference                                             Other lessons in this book
P2.9.18    Explain how vehicles and theme park rides are            P2: 9.4 Forcing the pace
           designed to absorb momentum in collisions to             P2: 9.10 Take a chance
           reduce injury to passengers.
P2.9.19    Assess the effectiveness of safety technology
           when travelling, including safety belts/harnesses,
           crumple zones and airbags to prevent injury,
           when provided with appropriate data.

Literacy                     Leaflet                                              Student Book pages 212 to 213
ICT                          Internet research                                    Technician’s notes P2: 9.8
                                                                                  Worksheet P2: 9.9(1)

air bag                   collision                 crumple zone              momentum                seatbelt

 Drop an egg on to a hard surface and note the effect. Then drop another egg on to a
   soft surface chosen so that the egg will not break. Make sure that both eggs have the        Technician’s notes P2: 9.9
   same distance to fall. Ask pupils to discuss in pairs why the soft surface allows the egg
   to remain unbroken.
 Ask pupils to imagine that they are buying a car. Ask them to write down five things that
   would be most important to them in choosing a car. Collect answers and make a list with
   frequency count for the different responses. Discuss the importance they have assigned
   to safety.

Learning outcomes
 state that cars may contain safety features designed to protect occupants in a collision
 state that these may include seatbelts, crumple zones and airbags
                             Teaching and learning activities                                           Resources

Remind pupils of the compressibility of gases and incompressibility of liquids and solids       Technician’s notes P2: 9.9
using syringes containing a solid, liquid or gas.
Model seatbelts and crumple zones using a trolley on a ramp.
                                                                                                Worksheet P2: 9.9(1)
Ask the pupils to answer questions 1 to 4 on page 212 of the Student Book.
Go through the answers.                                                                         Student Book page 212
Learning outcomes
 explain that there is evidence that safety features in cars do save lives
 state that not everybody wears seatbelts and explain why this may be the case
                               Teaching and learning activities                                          Resources

Pupils should have read ‘The Protectors’ section of the Student Book. Pupils are going to       Student Book page 212
protect an egg dropped on to hard surface so that it does not break. Remind them of the
various systems used in cars to protect the occupants.
                                                                                                Technician’s notes P2: 9.9
Ask the pupils to answer questions 5 to 8 on page 213 of the Student Book.
Go through the answers.                                                                         Student Book page 213

Learning outcomes
 explain how car safety features work, in terms of reducing forces on occupants during a collision
                               Teaching and learning activities                                          Resources

Ask pupils to answer questions 9 to 12 on page 213 of the Student Book.                         Student Book page 213
Go through the answers.
Use question 12 as a basis of research into safety features incorporated into modern cars.      Internet access

 Ask pupils who successfully protected their eggs to explain how their system worked.
 Ask pupils which safety system:
   –   would be found at the front of the car
   –   relies on compressibility of gases
   –   might actually present a danger to some people
   –   needs you to remember to use it
   –   has evidence to suggest that it has saved a lot of lives.

            LOW DEMAND                              STANDARD DEMAND                              HIGH DEMAND
1 Seatbelts will stop you hitting             5 Over 90% of people wear them.            9 The wearer will continue moving for
  something hard wherever you are             6 People may wear them if they realise       longer, reducing the force on them.
  sitting.                                      they could kill the person sitting in   10 The user will continue moving for
2 Seatbelts stretch permanently in a            front of them.                             longer, reducing the force on them.
  collision.                                  7 Fatalities in road accidents have       11 The passenger compartment will
3 The force of the airbag itself could          dropped considerably since they            continue moving for longer,
  hurt you.                                     were made compulsory.                      reducing the force on the
4 If the car is too rigid the impact is       8 Pupils’ leaflet design                     occupants.
  transferred directly to the people in                                                 12 You might find out that there are
  the car.                                                                                 ‘passive’ and ‘active’ safety
                                                                                           features and be able to describe
                                                                                           some examples of both.

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