What is the formula for calculating density?

• D = m/v

• D = v/m

• D = m*v

• D = m+v

Why does a block of wood float on water?

• Because its density is less than that of water

• Because its density is greater than that of water

• Because it has no mass

• Because it has no volume

What two measurements are needed to calculate density?

• Mass and volume

• Mass and weight

• Volume and weight

• Height and width

How can density help identify a mystery metal?

• By comparing its density to known values

• By measuring its color

• By testing its hardness

• By checking its temperature

Why do hot air balloons rise?

• Because the air inside is less dense than the cooler air outside

• Because the air inside is more dense than the cooler air outside

• Because the balloon is filled with helium

• Because the balloon is lighter than air