Density 7th Grade

Which lab tool might you use to measure the volume of a liquid?

• electric scale
• ruler
• test tube
• graduated cylinder

What is the formula for density?

• density = mass x volume
• density = mass / volume
• density = mass + volume
• density = mass - volume

Frank has an eraser. It has a mass of 4g, and a volume of 2ml. What is its density?

• 8 g/ml
• 2 g/ml
• 1/2 g/ml
• 24 g/ml

Which is closest to the mass in kilograms of the bag of apples?

• 2
• 3
• 4
• 5

What is the volume of the fish?

• 18.0 cm³
• 6.0 cm³ 
• 32.0 cm³
• 38.0 cm³

Put the liquids in order from most dense to least dense?

• 4, 3, 2, 1
• 1, 2, 3, 4
• 3, 4, 2, 1, 
• 4, 3, 1, 2

Which box has a higher density?  

• Box A
• Box B
• cannot be determined
• they are the same

Water at 20°C in an uncovered pan is evaporating very slowly. What could be done to the water to make it evaporate more quickly?

• Cover it

• Add salt to it

• Increase the motion of molecules

• Decrease the motion of molecules

Water vapor (a gas) changes to liquid water during which process?

• melting

• precipitation

• condensation

Which process is an example of a physical change?

• milk souring

• wood burning

• iron rusting

• ice melting