Density Review 7th Grade

Which has a greater density? A piece of wood that has a mass of 15 g or a piece of the same wood that has a mass of 10 g. Each piece of wood is made of identical (same) material.

• The piece of wood that has a mass of 15g.

• The piece of wood that has a mass of 10 g.

• Both have the same density.

An irregularly shaped rock was lowered into a graduated cylinder holding a volume of water equal to 50 mL. The height of the water rose to 70 mL. What is the volume of the rock?

The rock has a mass of 200 g and a volume of 255 mL. What is the density of the rock?

Will the rock float on water? The density of water is 1.0 g/mL.

• Yes, the rock will float on water.

• No, the rock will not float on water.

Jill has a gel pen. The gel pen has a mass of 8 g and a volume of 2 cm³. What is the density of the gel pen?

Calculate the volume of the block.

________________ is the amount of matter within a certain volume.

• volume

• density

• mass

• length

________________ is the amount of space an object takes up.

• volume

• density

• mass

• length

A rock has a density of 3.5 g/cm³, when the item is placed in a tank of water it will __________________.

• sink

• float

What is the density of water?