Iron dumbbells are heavier than aluminium dumbbells or the same size.

Why?

• iron has a greater density than aluminum.

• iron has a less density than aluminum.

• iron has a same density of aluminum.

Density

• how heavy something is for its size.

• how big something is for its size.

• how light something is for its size.

• how small something is for its size.

True or False

A 1 cm³ cube of iron is heavier than a 1 cm³ cube of aluminium.

• True

• False

Density is equal to

• mass / volume

• volume / mass

• mass X volume

Mass of block of lea is 44 g and volume of block of lead is 4 cm³ cube. Find the density

• 0.1 g/cm³

• 11 g/cm³

• 176 g/cm³

The density of a substance depends on two things:

• The mass of its particles

• How closely packed its particles are.

• The wight of its particles

True or False

The liquid has a greater density than the gas.

• True

• False

True of False

The liquid has a greater density than the solid.

• True

• False

True of False

Ice has a lower density than liquid water.

• True

• False

why ice floats on water.

• Ice has a lower density than liquid water.

• Ice has a higher density than liquid water.