Unit 2 Electricity Lesson 1 Dangers of electricity

Unit 2 Electricity Lesson 1: Dangers of electricity and How to deal with it.

Importance and uses of electricity • • 1. cook food ( in microwaves) 2. Light houses , schools and streets 3. Preserves food in refrigerators 4. provides machines( T. v , radio, ……) with electricity

Save Electricity

Materials can be classified according to their ability to conduct electricity into Electric conductors • They allow electric current to pass through it • Examples: iron, aluminium, copper and water. Electric insulators • They do not allow electric current to pass through it • Ex: Wood , Plastic and Rubber

If you did not deal with the electricity in a proper way Some injuries may happen Direct injuries • Types • Electric fire • Electric shock • Electric burn Indirect injuries • Caused by falling from a ladder due to electric shock

Direct injuries • Electric fire • Caused due to: • Putting more than one machine in one socket • Not disconnecting the electricity from a machine ( electric iron, heater) after use.

• Caused due to 2. Electric shock • Both hands touching 2 wires connecting to electricity • Apart of your body is connecting to electricity and the other part is connecting to a conducting material connected to the ground ( imagine yourself standing over a chair made of iron and touching a wire with your hand)

Electric burn • Caused due to • Your hands touches a fire or spark • Your hands touhes an electric machine that generates electricit ( electric iron)

Precautions in dealing with electricity • Do not touch any plugged electric machine with wet hand. • Do not insert many connections in one sockect • Do not insert any metal object in the socket

Water is not used to put out fire resulting from electricity…. ? • Answer: Water is a good conductor of electricity, so it increases fire • Sand is used instead of water to put out fire

Model answer of lesson 2 unit 2 • • • • • Complete Page 13 in the worksheet 1. houses, streets 2. insulators and conductors 3. wood, plastic 4. iron, copper 5. Direct and indirect 6. fire 7. fire. 8. increase in temperature, electric fire 9. increase in temperature 10. Regular, water, sand 11. electric, good conductor of electricity 12 electric shock 13 fire, direct 14. electric burn 15. wet 16. electric machine, electricity

Write the scientific term page 14 • • 1. Electric conductor 2. Electric energy 3. Electric insulator 4. Water 5. sand 6. Electric shock Note: All Give reasons and what happens are answered at the end of the work sheet.