Density

What is density?

• it is the volume per unit mass of a substance

• it is speed x time

• it is distance/time

• it is the mass per unit volume of a substance

Which of these is the densest ?

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Which of these is the least dense?

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Which of these is a gas?

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Which of these is a solid?

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Which of these is the equation for density?

• mass/volume

• speed x time

• distance/time

• m/v

Why would an object float in another substance?

• It is denser than the substance

• It is less dense than the substance

• The substance is denser than the object

• The substance is less dense than the object

You have a rock with a volume of 15cm³ and a mass of 45 g. What is its density?

• 60g/cm³

• 3g/cm³

• 0.33g/cm³

• 630g/cm³

You have a different rock with a volume of 30cm³ and a mass of 60g. What is its density?

• 60g/cm³

• 2g/cm³

• 0.33g/cm³

• 630g/cm³

You decide you want to carry a boulder home from the beach. It is 30 centimeters on each side, and so has a volume of 27,000 cm³. It is made of granite, which has a typical density of 2.8 g/cm³. How much will this boulder weigh?

• 75,600 g

• 9642.9 g

• 75,600 cm³

• 9642.9 cm³