Teacher Site Map
7th Grade Core
USOE Science Home Page
USOE
 
Water has a density of 1.0 g/cm3(one gram per cubic centimeter). Objects that have a density greater than 1.0 g/cm3 will sink in water. Objects that have a density less than 1.0 g/cm3 will float in water.

Your challenge is to compare the density of known objects to water and determine if the objects will sink or float. Move your mouse over your answer.

 

1. This candle has a density of 0.9 g/cm3.

Sink or Float

2. This penny has a density of 5.0 g/cm3.

Sink or Float

3. This lima bean has a density of 1.2 g/cm3.

Sink or Float

4. This rock has a density of 1.3 g/cm3.

Sink or Float

5. This piece of coal has a density of 1.1 g/cm3.

Sink or Float

6. This corn kernel has a density of 0.4 g/cm3.

Sink or Float

7. This piece of rubber has a density of 1.5 g/cm3.

Sink or Float

8. This copper turning has a density of 8.9 g/cm3.

Sink or Float

 

Analysis:

How well did you predict which objects would float and which would sink in water

Extension:

What other items would you like to compare with water?

  • Get permission and try your other objects and learn how to calculate their density using the formula:

Review science safety rules here.

Get the plug-ins: Get Adobe Acrobat Reader , and Get Quicktime Player. (The Quicktime plug-in is needed to play sounds and movies correctly.)

Want to share photos of you or your friends doing this activity? Send it in an e-mail with the following information:

  1. The title of the activity
  2. The URL (Internet address)
  3. Your name.

Remember that no pictures can be used that show student faces or student names on it. 

Teachers should view the Teacher Site Map to relate Sci-ber text and the USOE 7th grade science core.


Updated October 24, 2008 by: Glen Westbroek

Science Home Page | Curriculum Home Page | 7th Science Core Home Page | USOE Home Page


Copyright Utah State Office of Education.