Share Science 4.Unit 6.1-6.3: Electricity
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Materials made of ceramic, plastic and cork are electrical _____.
conductors
insulators
What is a conductor?
A battery
A material that blocks electricity
A material that allows electricity to flow through it
A device that stores electricity
Why is metal used in wires?
Because it's cheap
Because it looks shiny
Because it conducts electricity
Because it is heavy
Which one is NOT a conductor?
Key
Chopstick
Copper statue
Coin
What property do all good electrical conductors have?
They are flexible
They allow electric current to pass easily
They are light in weight
They are colorful
Which set of objects cannot conduct electricity?
wooden toy, glass, coin
plastic spoon, metal fork, cork
book, cork, ceramic bowl
key, paper cup, cork
What happens when pure water is tested with a bulb circuit?
The bulb explodes
The bulb lights up brightly
The bulb doesn’t light up
The water boils
Tap water conducts electricity because it contains...
Chlorine only
Bacteria
Oil and fats
Dissolved salts and minerals
What should you do if your hands are wet?
Avoid touching electrical appliances
Touch only metal parts
Plug in devices quickly
Use more water to rinse them
Which of these is the safest location to use an electrical device?
Dry place
Outside in the rain
In a bathroom
A conductor is most likely made from which of these?
Paper
Glass
Plastic
Metal
Why is plastic used on the handle of screwdrivers used in electrical work?
It is more colorful
It is lighter
It is more expensive
It insulates against electricity
Which of these materials is safest to touch during an electrical repair?
Rubber gloves
Wet cloth
Metal fork
Copper rod
Which part of a wire is the conductor?
The metal core
The label
The outer jacket
The plastic coating
Which part of a wire is the insulator?
The wire tip
The rubber covering
The metal clip
The copper strand
Why are electrical sockets made from insulating materials?
To prevent electric shock
To reduce cost
To improve heat conduction
To improve appearance
