grade 5 , con 5 , lesson 4

Helium is lighter than air, this property is considered as.........

• a physical property only.

• a chemical property only.

• both physical and chemical property.

• neither physical nor chemical property.

Blimps are filled with .............to rise up in the air.

• oxygen gas

• carbon dioxide gas

• atmospheric air

• helium gas

We can use copper to make...........

• handles of cooking pans.

• body of cooking pans.

• gloves.

• tires.

Steel is used in making hammers, because it is .............

• flexible.

• smooth.

• hard.

• transparent.

Glass is transparent, so it can be used in making

• eyeglasses.

• tires.

• screwdrivers.

• gloves

All the following are from the physical properties of copper, except that.......

• it is good conductor of electricity.

• it is good conductor of heat.

• it can be stretched into thin wires.

• it is lighter than air.

Rubber is used to make all the following, except. .............

• athletic shoes.

• gloves.

• tires.

• windows.

From the chemical properties of helium is that he is not flammable

• true

• false

Copper is used in making cooking pans because copper is a good conductor of electricity

• true

• false

Hammers must be very strong so they are made of steel

• True

• False