work based ba pte year 2 science in the primary years
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Work Based BA PTE Year 2 Science in the Primary Years. Unit 5 Session 1 Forces 1. Learning objective: To deepen personal understanding about the nature of forces. National Curriculum See unit notes. Brainstorm: What do you understand by the word ‘force’?. What might children say?. - PowerPoint PPT PresentationTRANSCRIPT
Work Based BA PTE Year 2
Science in the Primary Years
Unit 5 Session 1Forces 1
Learning objective:
•To deepen personal understanding about the nature of forces
National CurriculumSee unit notes
Brainstorm:
What do you understand by the word ‘force’?
A force is:A force is:
• a push
or• a pull
How can a large cardboard box and a small student assist in the teaching of forces?
What forces are acting on the student?
gravity
Why does she not move down through the floor if gravity is pulling her down?
Gravity
Contact force
Gravity
Contact force
Push!
Gravity
Contact force
Push!
Friction
Some key ideas
A force is measured in:
ons s
Newtons!
Forces have effects in different directions
Forces can be added
gravity
Contact force
Push
Forces can balance
Push
A force is a vectorA force is a vector
It has:• size
and • direction
Spend 5 minutes on each of the 2 activities on the handout:
1. Feeling and measuring forces (in pairs)2. Heave Ho! Adding forces together (in a group of 6ish)
Contact forces and non-contact forces
• Read Summary of Scientific Ideas on Forces
Unit notes pp 3-11
There are only a few different types of forces:• gravitational• electric• magnetic (related to electric)• strong nuclear• weak nuclear
Every movement that starts or stops requires a force.
Three common forces are:• gravity (weight)
• contact force (reaction force)• friction
Circus of 4 activities – see handouts
• Contact Force 1• Contact Force 2• Friction 1• The cause of friction
Weight (gravity)
Contact force
Forces can balance
Summary of key points
What does this show?
The contact force with a surface is caused byspringy atoms
push
friction
Friction
Resistance due to distortion of bristles
A rather sad comb!
What causes friction?
Analogous to two surfaces in contact
Why don’t the Australians drop off?
What causes gravity?
‘The core is like a big magnet.’
‘Is it because the world is spinning?’
Mass attracts mass
Sorry…no excuse
‘Pencils produce gravity but not enough to attract anything.’
‘If you push the two books out in a space craft, in a few days they would gradually pull together…where there’s no friction.’
‘It’s a force that pulls things to the centre of the earth.’ ‘It makes things fall’
‘It causes the tide to come in.’
‘I think it’s a force that grows in outer space and it picks up rubble and pulls it together.’
Concept cartoon 11.6
Discuss skateboard example
Required Reading:• Johnsey et al. (2002) Chapter 9 • Sharp et al. (2002) pp.91-92
Also:
Explore/read the Handout – plenty of useful information!