1. A couple of points about the
homework
• It is unacceptable not to hand it in, on time
• Some people did not complete the initial task,
working out the gradient
• You need to become better at using precision,
accuracy and reliability in evaluations

2. Working out gradients
• In science, gradients will almost always have
units.
• You need to use the longest possible section
of the line of best fit. The longer the line, the
more precise the gradient will be.
• Be aware of what level of precision you can
claim with the gradient. You are claiming
almost infinite precision if you write the
gradient as a fraction.

3. Future transport that won’t impact
your future!
• Do you have a great idea about how future transport
can reduce its effect on the environment?
• Then University of Leeds wants to hear from you….
• You need to design a poster (max A3) or 1 PowerPoint
slide explaining your idea
• You could win the chance to attend an national TED
event
Entries to your science teacher
by Monday 8th Oct

4. Materials

5. Card sort
• Cut out the cards in front of you
• Sort the materials into groups based on their
properties
• Try and label the properties that you are
grouping them around.

7. Materials
Materials can be broken down into groups, three of these
are:
Metals – Tough
Ceramics – Brittle and hard
Polymers – Elastic or brittle or tough
Each group has its own set of properties.
Composites – Combine the properties of two or more
materials

8. Ceramics
• Hard and Brittle • Examples are glass,
• Shatter on impact china, pottery, flint.
rather than deforming. • Modern ‘engineering
• Can be very hard so do ceramics’ are alumina
not squash or dent. and silicon carbide.

9. Metals
• Can be elements or • Elemental examples
alloys of a few occupy the LHS of the
elements. periodic table.
• Tend to have a • Alloys include Steel
crystalline structure. (Iron + Carbon), Brass
(Copper + ?), Pewter
(Tin, Antimony)

10. Polymers
• Often referred to as • In nature, leather,
‘plastics’ cotton, and natural
• Can be natural or man rubber are all polymers.
made. • Man made plastics
• Tend to have long include polythene and
chains in the structure polyester.
which influence their
properties.

11. Composites
• Combines the desirable • Natural examples
properties of more than include bone.
one material. • Man made examples
include tyre rubber,
fibre glass, carbon fibre,
reinforced concrete,
tarmac, windscreen

12. Homework
• You are going to work in groups of no more than
four
• You will create an A3 poster which will show the
following:
– Definitions of the words already provided
– A use of the properties in different materials
– Describe why the materials were chosen for that
property
– A bibliography of resources used

13. Future transport that won’t impact
your future!
• Do you have a great idea about how future transport
can reduce its effect on the environment?
• Then University of Leeds wants to hear from you….
• You need to design a poster (max A3) or 1 PowerPoint
slide explaining your idea
• You could win the chance to attend an national TED
event
Entries to your science teacher
by Monday 8th Oct