Calculating Density of Regular and Irregular Objects

What does density have to do with atoms?

• Density describes how atoms float

• Density describes how closely the atoms of an object are packed together

• Density describes how many atoms an object has

• Density?! Atoms?! They have NOTHING to do with each other!

If the mass of an unknown substance is 105 grams and the volume is 35 cm.³ What would be its density? (round)

• 2.7

• 3.5

• 4.00

• 3.00

The unit for measuring density it

• cm3

• g

• ml

• g/cm3

You have calculated the density of an unknown substance to be 2.7g/cm3. Using the picture above what is the identity of the sample?

• zinc

• aluminum

• copper

• gold

Tags

NGSS.MS-PS1-2

You have calculated the density of an unknown substance to be 11.34g/cm3. Using the picture above what is the identity of the sample?

• gold

• copper

• lead

• silver

Tags

NGSS.MS-PS1-2

A bar of copper has a mass of 216g and a volume of 24 cm3. What is the density of copper?

• 9g/cm3

• 5184g/cm3

• .11g/cm3

• 322mL

Jack has a rock. The rock has a mass of 14g and a volume of 2cm³. What is the density of the rock?

• 7 mL

• 7 g/cm³

• 28 g/cm³

• 1/7 g/cm³

Frank has an eraser. It has a mass of 4 g and a volume of 2cm³. What is the density?

• 2 g/cm³

• 4 g/cm³

• 8 g/cm³

• 2 g/in³

Frank has a paperclip. It has a volume of 3 cm³ and a mass of 9 grams. What is its density?

• 3 g/cm³

• 9 g/cm³

• .33 g/cm³

• 27 g/cm³

What is the density of an object that measures 6mL and 12g?

• 2 g/mL

• 0.5 g/mL

• 6 g/mL

• 12 g/mL