Term 3 Topic 4 Elastic & Springs Copy IntroductionMany vehicles are systems that use wheels and axles.Wheels and axles help vehicles to move more easily.Ice BreakerGreet the learners.Show them your toy car/truck and push the toy across your desk.Ask learners why the car/truck can move forward.Possible Answers:It has tyres, wheels, an axle, elastic, you are pushing it.Teacher Input 1Ask learners what shape the wheels of the toy car are (round/circle).Ask them why they think the wheels need to be round.Possible Answers:If they were square, it would be bumpy when you push it.If they were oval it wouldn’t turn smoothly:Show learners the picture of Egyptians pulling a huge stone block. You will find this picture on pg 53 of THUNDERBOLT KIDS.Ask learners why they put the blocks on round logs.Possible Answers:To move it more easily; to work together; because they can’t lift the block.Show learners the following simple demonstration:- Place a stone on a piece of cardboard.- Place the cardboard on a number of pencils.- Now push the stone gently forward.- Ask learners what they notice about the demonstration.Possible Answers:The pencils moved forward and in a circular movement when you pushed the stone; the pencils acted like wheels.Show Presentation 1, explaining as you go through it.Explain to learners that when we have to move a real heavy load, we have to use a great deal of force to push it, because of: Friction: A force that resists the motion of the object on the ground.Gravitational force: Force that pulls the object to the ground. This problem is solved through the uses of wheels and axles.Show Video Clip 1 (12.46 minutes). This video explains the functioning of simple machines (wheels and axles).Learner Activity 1Hand out Worksheet A and let learners complete it.Ensure that learners cut out neatly and safely, pasting and labelling their items correctly.Teacher Input 2Greet learners.Ask them to describe a wheelbarrow.Ask them to say why a wheelbarrow is useful.Possible Answers:It helps us carry things more easily; it moves heavy things.Show Presentation 2, explaining as you go through it.Show Video Clip 2 (12:46 minutes). In this video we learn how wheels and axles work.Learner Activity 2Hand out Worksheet B and ask learners to complete it.Learners will need to form groups of 4.Teacher Input 3Tell children that in the olden days, children often had to make their own toys.We don’t need any expensive things to make a toy car – we can even use a plastic cooldrink bottle.Show Video Clip 3 (3:38 minutes). The video shows how to make a toy car from a plastic bottle.Challenge learners to make their own toy cars and to come and show it to the class.If time permits, this activity can be done in class.Show Video Clip 4 (14:32 minutes). To make the car, learners will need:4 toothpicks.2 drinking straws.4 bottle caps.rubber bands or loom bands.Modelling Clay for extra weight.Hot Glue Gun or other strong glue.Soldering iron.Revision Activity 1 Learners complete Quiz 1. By Administrator|2017-08-16T09:20:34+02:00July 16th, 2015|0 Comments Share This Story, Choose Your Platform! facebooktwitterlinkedinredditwhatsapptumblrpinterestvkEmail About the Author: Administrator Leave A Comment Cancel replyYou must be logged in to post a comment.