Density - Show what you know!

What is your name?

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 dressings must be shaken to mix them. How is this an example of density?

• The oil and the 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 the substance by its weight.

• Divide the length of the substance by its temperature.

• Divide the mass of the 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.

Given the following information, which of the statements is true?

Rock 1: 6g 3cm3

Rock 2: 8g 4cm3

Rock 3: 4g 2cm3

• Rock 3 would float on water.

• Rock 2 is the most dense.

• All rocks have the same density.

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