Density Review

If a scientist comes across an

unknown element, could she use

density to identify the element

• Yes, because each element has

  a specific density.

• No, because density changes

  easily.

• Maybe, if she can determine the

  element’s melting point.

Which best describes displacement?

• measuring how much matter is

  present in a substance by using

  a scale

• measuring how much space

  matter occupies by using a

  graduated cylinder

• measuring how dense matter is

  by using the density formula

Oil and vinegar salad dressings must

be shaken to mix them. How is this

an example of density?

• The oil and vinegar have

  different densities and separate.

• The oil and vinegar have the

  same density and separate.

• The oil and vinegar’s densities

  keep changing.

How do you calculate density?

• Divide the mass of a substance

  by its weight.

• Divide the length of a substance

  by its temperature.

• Divide the mass of a substance

  by its volume.

A substance has a mass of 6 grams

and a volume of 3 cm3. What is its

density?

• 2 g/cm3

• 18 g/cm3

• 0.5 g/cm3

In an oil spill, the oil floats on top of

the water. This is because the oil is

• less dense than water.

• more dense than water.

• just as dense as water.

A substance has a density of 2.0 g/

mL. When you drop it in water, it will

• sink

• float

• sink at first but then float

What tool would you use to measure

mass?

• triple beam balance

• thermometer

• ruler

In the equation D = M/V, what does

the M stand for?

• milliliter

• mass

• matter

What are the units for density of a

liquid?

• grams per milliliter

• grams per cubic centimeter

• grams per degree Celsius