Downloaded 17 times
Simple machines natural science 3rd primary
- 1.
- 2. SIMPLE MACHINE ■ Asimple machine has one or few components Example: lever, hammer, scissors, screw, pulley, ramp
- 3. COMPLEX MACHINES ■ Acomplex machine has a lot of elements Example: bicycle, car, computer, mobile phone, clock
- 4.
- 5.
- 6. EXAMPLES OF LEVERS SCISSORSNUTCRACKER NAIL CLIPPER SEESAW WHEEL BARROW TONGS
- 7.
- 8.
- 9.
- 10. QUESTIONS ■ What kindof machine is a computer? ■ What kind of machine is a hammer? ■ What are the three parts of a lever? ■ Let’s think in examples of simple machines (Write 5 words) ■ Let’s think in examples of complex machines (Write 5 words)
- 11. ACTIVITIES 1. Classify thesemachines in simple or complex. lever – car – computer – hammer – pulley – clock – bicycle – ramp – wheel - telephone SIMPLE COMPLEX
- 12. ACTIVITIES 2. Match thename with the picture Inclined plane Wheel Pulley Lever Hammer Screw
- 13. ACTIVITIES ■ Write load,fulcrum or effort in this levers
- 14. JOURNAL ■ Write anddraw three examples simple and three of complex machines