Quba Electricity

Kofi has build an electrical circuit. The lamps are off, what does Kofi do to turn the lamps on?

• Replace the lamps
• Close the switch
• Disconnect the wires
• Remove the batteries

Match the following

• Open switch symbol

• 
• wire symbol

• 
• close switch symbol

• 
• lamp symbol

• 
• battery symbol

• 

Cables and wires need to be good electrical conductors, they are made of?

• Iron and steel
• Plastic and rubber
• Copper and aluminum
• Gold and silver

.For safety, wires are covered with materials that do not conduct electricity. 

The wires are covered with?

• conductive materials like copper
• non-insulating materials like metal
• transparent materials like glass
• insulating materials like rubber or plastic

Any material that is a non conductor is an?

• Conductor
• Superconductor
• Semiconductor
• Insulator

Why is copper used to make electrical wires?

• Copper is an excellent conductor of electricity.

• Copper is too brittle for wiring applications.
• Copper is a poor conductor of electricity.
• Copper is too heavy for electrical wires.

Why is copper used to make cooking pots and pans? 

• Copper is lightweight and easy to mold.
• it conducts heat well and is durable.

• Copper is non-reactive and prevents food from sticking.
• Copper is inexpensive and widely available.

Organize these options into the right categories

Groups:

(a) Isulators

,

(b) conductors

• Glass
• Copper
• Ceramic
• Steel
• Carbon
• Iron
• Rubber
• Plastic
• Wood
• Paper

What is the name of the following circuit symbol?

• buzzer

• lamp

• bulb

• bowl

Why can plants,animals and human conduct electricity?

• They are made of metal which conducts electricity.
• They generate electricity through photosynthesis.
• They contain water and electrolytes that allow the flow of electric current.
• They have a built-in electrical system like machines.