1. Science Friction STEM Project

2. Science Brought To Life Forces in Action  What is a force?  What happens when you slide on the floor in shoes compared to socks?

3. Science Brought To Life What is Friction?  What is a Force? A push, pull, twist or turn  Can anyone name a Force? Gravity, friction, weight  What is Friction? Friction is a force which occurs when two objects move over each other. It tries to stop them moving Draw an example of friction in everyday life – is it good or bad?

4. Examples of Friction Friction can be good or bad!

5. Science Brought To Life Why is Friction Important?  You experience friction every day  Friction is important to us at Croda  We make chemicals to make plastics more slippery  We make chemicals to help engines work more efficiently

6. Science Brought To Life Video – Plastics Additives

7. Activity 1 Surfaces Science Friction

8. Science Brought To Life Activity 1 – Surfaces  Let’s test 3 different surfaces to see how well a model car slides down them  Work in groups First thing to do:  Colour in 3 stripes on paper  One stripe of pencil  One stripe of crayon  One stripe of felt tip

9. Science Brought To Life Activity 1 – Surfaces  Make a prediction before we test!  Make 3 model ‘cars’ by putting play-doh into foil cups  Slide the cars down the stripes on a ramp – which surface works best?

10. Science Brought To Life What Did You Find?  Felt tip  Crayon  Pencil

11. Activity 2 Lubricants Science Friction

12. Science Brought To Life Can you help us?  Scientists at Croda need to find a new friction modifier  A friction modifier is also called a lubricant  Lubricants help us to reduce friction between two surfaces, such as parts in an engine  Can you help us to find the best lubricant?  A, B or C

13. Science Brought To Life Activity 2 – Lubricants  First, let’s make another prediction!  Take the laminated sheet of plastic, pipette on a small amount of A, B and C  Feel them to see which you think will help the car slide fastest & why  Everyone make a note of your individual prediction

14. Science Brought To Life Equipment  This is what your car and ramp will look like:

15. Science Brought To Life

16. Time to slide Slope height Car weight Slope surface Speed of car Time to slide Car weight How does the type of lubricant affect the speed of the car? Car type Which is the best lubricant? Amount of lubricant Type of lubricant Slope surface

17. Science Brought To Life Activity 2 – Lubricants  How can we produce a graph of our results?

18. Science Brought To Life What Have We Found?  Which was the best lubricant? A, B or C?  Why did they perform differently?