ENVIRONMENTAL EARTH SCIENCE

DENSITY

NAME ________________________________ PERIOD _____ DATE ____________

USE YOUR TEXTBOOK, NOTES, THE INFORMATION ON THIS WORKSHEET, AND YOUR OWN REASONING TO ANSWER THE FOLLOWING QUESTIONS.

Density is the average amount of mass in each unit of volume of an object. Put another way, density is the amount of matter in an average cubic centimeter of an object. You can also say that if all the material that something is made of were distributed evenly (no lumps), so that every cubic centimeter of it had the same mass, its density would be equal to the mass in each cubic centimeter.

1. Name five things that are made of material that is distributed evenly, and so have the same density throughout.

 

 

2. Name five things that are made of materials that are not distributed evenly.

 

 

3. Name five materials that have different densities in order of increasing density. Do not include things that have different masses only because their size is different. Share your list with someone else to see if they agree with you.

 

 

Density is determined by dividing the mass of an object by its volume. Another way to put this is:

     (number of grams of mass of an object)
_____________________________________________________ = density
(number of cubic centimeters of volume of the object)

or, more simply: D = M/V (D=density, M=mass, and V=volume).

4. What two measurements do you use to find density?

 

5. The units for mass are ____________ , the units for volume are _____________, so the units for density are_____________ .

6. This unit for density would be said:

a. cubic centimeter per gram.
b. pounds per square inch.
c. grams per cubic centimeter.
d. miles per hour.

7. On a balance scale, a rock is measured and has a mass of 40 g. The rock is lowered into a graduated cylinder and raises the water level from 32.0 ml to 52.0 ml (this is called finding volume by displacement).

The rock's volume is:

What is the density of the rock?

 

8. A block of wood measures 10 cm by 5 cm by 3 cm. It has a mass of 100 g. Its density is:

 

9. What is the density of water ?

 

10. In terms of density, tell why wood floats and most rocks sink.