Electricity and Materials Quiz

What is a conductor?

• A material that blocks electricity

• A material that electricity can pass or flow through without any difficulty

• A material used only in batteries

• A type of metal

What are materials that do NOT allow electricity to flow through called?

• Conductors

• Insulators

• Wires

• Liquids

What will this lesson investigate?

• If all liquids are pure

• If water is a conductor or insulator

• How to make salt water

• The difference between plastic and metal

What is a pure substance in science?

• A substance that glows in the dark

• A substance that does not have anything mixed or added with it

• A substance that contains salt

• A mixture of solids and liquids

What is true about tap water?

• It is a completely pure substance

• It has salts such as chlorine dissolved in it

• It contains no substances inside

• It cannot conduct electricity at all

Why is tap water not considered pure?

• Because it is cold

• Because it is filtered

• Because it has salts such as chlorine dissolved in it

• Because it is colorless

What materials are needed for the investigation?

• Magnet, battery, glass

• Plastic cup, spoon, vinegar

• Cell, wires with clip, lamp, glass with tap water, glass with salt water, distilled water, aluminum foil

• Beaker, sand, thermometer

How should the foil be prepared for the experiment?

• Cut into small pieces

• Folded into 2 cm wide strips and held in crocodile clips

• Crumpled into a ball

• Melted and poured into water

What do you predict will happen when foil is dipped in salt water or tap water?

• Nothing will happen

• Electricity may flow due to dissolved salts

• The foil will dissolve

• The water will boil

Why did Jawad get an electric shock?

• He was wearing rubber gloves

• The electricity was switched on, the wire was exposed, and he had sweaty/wet hands

• He drank salt water

• He used a plastic wire