Sorting Materials into groups

Pliers used by electrician usually have a plastic cover on the handle.Why?

• A) Plastic is a bad conductor of heat

• B) Plastic is water resistant

• C) Plastic is bad conductor of electricity

• D) All of these

Steel spoons used for cooking becomes hot easily.They are often given handle of

• A) Iron

• B) Copper

• C) Wood

• D) Aluminium

Find the odd one out from the following.

• A) Iron Nail

• B) Utensils

• C) Magnet

• D) Glass beaker

Which of the following is correct for the term ' lustre '?

• A) Hardness

• B) Softness

• C) Dull appearance

• D) Shiny appearance

Which one of the following is insoluble in water?

• oxygen

• sugar

• milk

• sawdust

The process of gases and liquids spreading into surrounding is called -

• conduction

• condensation

• diffusion

• freezing

Which one of the following will not attract magnet?

• Iron nail

• Steel rod

• Copper vessel

• A coin made of nickel

Identify the bad conductor of electricity-

• copper

• iron

• silver

• pure water

Heating or cooling can change the property of material.

• True

• False

All gases are poor conductors of heat.

• True

• False