9 Weeks Exam - Density

Volume is:

• • how much space is taken up by an object

• • the same as weight.

• • how much stuff is in something.

I want to determine the volume of a cereal box.

Which of the following instruments should I use?

• • metric ruler

• • thermometer

• • digital scale

• • graduated cylinder

You have a lead ball with a mass of 420 g. The density of lead is 10.5 g/cm3.

What is the volume of the ball?

(Hint: Use the equation: volume = mass/density.)

• • 40 cm3

• • 0.025 cm3

• • 4410 cm3

The base metric unit for mass is the:

• • gram

• • liter

• • Celcius

• • meter

Calculate the density:

• • 0.5 g/cm3

• • 2.0 g/cm3

• • 1.13 g/cm3

• • 2.27 g/cm3

Answer explanation

Subtract mass of empty container from mass of container with extra object

23.32 - 1.35 = 22

Subtract volume of empty container from volume of container with extra object

20.5 - 9.5 =11

Density = Mass / Volume (22/11)

Tags

NGSS.MS-PS1-2

Rocks are sometimes used along coasts to prevent erosion. If a rock needs to weigh 2,000 kilograms (about 2 tons) in order not to be shifted by waves, how big (what volume) does it need to be?

You are using basalt, which has a typical density of 3200 kg/m³

^{(VOLUME = MASS / DENSITY)}

• • 0.625 cm³

• • 1.6 m³

• • 1.6 kg/m³

• • 0.625 m³

Answer explanation

Volume = Mass / Density

0.625m3 = 2000kg / 3200 kgm3

While digging in the backyard, you find an old coin.  Its mass is 26.76 g and its volume is 3 cm³. 

Using the table , what is the coin made of?

• • copper

• • quartz

• • marble

• • platinum

Tags

NGSS.MS-PS1-2

If you place 1 mL of this liquid on a digital balance, what would its mass be?

(mass = density X volume)

• • 1.37 mL

• • 2 mL

• • 1 mL

• • 1.37 g

A laboratory instrument used to measure the mass of a solid:

• • digital balance

• • graduated cylinder

• • metric ruler

• • none of the above

Identify what the liquid is from these choices:

• • Honey - 1.63 g/mL

• • Vegetable oil - 0.92 g/mL

• Water - 1.0 g/mL

• • Corn syrup - 1.38 g/mL

Tags

NGSS.MS-PS1-2