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Unit 3E: Magnets and Springs

Unit 3E: Magnets and Springs. Magnets and Springs

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Unit 3E: Magnets and Springs Slide 2 Magnets and Springs Slide 3 Unit 3E: Vocabulary- Unit 3E: Vocabulary Useful Words Magnetic Non Magnetic Attraction / Attract Repulsion / Repel Bar Magnet Horseshoe Magnet Ring Magnet Iron Aluminium Poles A material that will be attracted to a magnet A material that will not be attracted to a magnet A FORCE pulling two objects together A FORCE pushing two objects apart A straight bar-shaped magnet A horseshoe shaped magnet, the two ends are the poles A doughnut shaped magnet, the two faces are the poles A metal which is magnetic A metal which is non-magnetic The two ends of a magnet Slide 4 Unit 3E: Forces Between Magnets: L.O. 1, 2, 3 : NC: 4.2a Unit 3E: Forces Between Magnets Opposite poles attract each other Like poles repel each other Slide 5 Unit 3E: Magnetic or Non Magnetic? : L.O. 4, 5, 6, 7 : NC. 4.2a Unit 3E: Magnetic or Non Magnetic? Which objects are magnetic? MagneticNon Magnetic Tennis ball Screw Shoe Marker Pen Keys Scissors Sweets Slide 6 Unit 3E: Uses of Magnets: L.O. 8 Unit 3E: Uses of Magnets What are magnets used for? Scrap yards (Cranes) Hospitals (MRI Scan) Speakers Fridge Magnets Locking Doors Compasses Slide 7 Unit 3E: Which is the strongest magnet? : L.O. 9, 10 : NC. 1.2d, 1.2e Unit 3E: Which is the strongest magnet? 1.How can we find out which magnet is the strongest? 2.What equipment will we need? 3.How will we know which magnet is strongest? 4.How will we record our results? Slide 8 Unit 3E: Which is the strongest magnet: Results table : L.O. 11, 12 : NC. 1.2h, j. Unit 3E: Which is the strongest magnet: Results table. Results Table MagnetNumber of paperclips picked up Magnet A Magnet B Magnet C Magnet D Slide 9 Unit 3E: Uses of Springs: L.O. 13 Unit 3E: Uses of Springs What are springs used for? Car/bike suspension ClockworkStaplers Playground Rides Closing Doors Trampolines Slide 10 Unit 3E: How Springs Work: L.O. 14, 15 : NC. 4.2 d Unit 3E: How Springs Work Slide 11 Unit 3E: How Springs Work: L.O. 16 : NC. 4.2 d, e, 1.2 d, e, f, g, h, j, l Unit 3E: Investigating Elastic Bands What do you think will happen if the catapult is pulled back further? Test what happens when the catapult is pulled back by different amounts. Slide 12 Unit 3E: Investigating Elastic Bands: Results: L.O. 17,18,19 : NC. 4.2 d,e, 1.2 l Unit 3E: Investigating Elastic Bands: Results Distance catapult pulled backDistance car travelled 2 cm 4 cm 6 cm 8 cm 10 cm The car travelled furthest when we pulled it back _______ cm This tells us that when the car is pulled back further, the force from the elastic bands is __________________ Can you explain why the results showed this? Slide 13 Unit 3E: Summary Magnets Have 2 ends called poles Magnetic and non-magnetic materials Different types Uses of magnets MRI scanners recycling fridge doors strong weak bar ring horseshoe bar ring horseshoe opposite attract like repel non-magnetic Non-metals rubber aluminium wood magnetic speakers nickel steel iron Slide 14 Unit 3E: Summary Springs Uses of springs Playground rides staplers clockwork trampolines Apply a force stretch compress big force small force compresses more compresses less big force small force stretches more stretches less