Measuring Matter

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A balloon filled will air does not rise as high as a balloon filled with helium. What does this tell you about the density of helium?

• Helium is more dense than air
• Helium is less dense than air
• the two gases have the same density
• when heated, helium becomes more dense.

The amount of matter in an object is a measure of its

• volume
• density
• weight
• mass

The formula for calculating density is

• mass X volume
• mass X weight
• mass/volume (mass divided by volume)
• volume/mass (volume divided by mass)

Which of the following statements about the mass of an object is correct?

• mass changes with location
• mass remains constant
• mass changes with altitude
• mass changes with gravity

The SI unit of mass is the cubic meter

• true
• false

The density of a substance changes if you change its volume.

• True
• False

An object's weight is less on the moon compared to it's weight on Earth because on the moon, the object's mass decreases.

• True
• False

An object that floats in room temperature water has a density of less than 1 g/mL.

• true
• False

One milliliter (1 mL) is equal to one cubic centimeter (1 cm3).

• true
• false