Basics of Matter

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...

• more dense than water.

• less dense than water.

• just as dense as water.

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

• 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?

• Thermometer.

• Graduated cylinder.

• Triple beam balance.

In the equation D=M/V, what does the M stand for?

• Milliter

• Mass

• Matter

What are the units for density of a liquid.

• grams per milliter.

• grams per cubic centimeter.

• grams per degree Celsius.

A life jacket floats on water. What do you know about the life jacket?

• It is more dense than water.

• It is less dense than water.

• It is just as dense as water.