John Sengia
LS 521 Sm02
6/7/02
Web dropin
WEB DROP IN #2





Introduction

Density is a physical property that can be used to identify a substance. Density also plays a role in determining if an object will float or not. in this activity, you will test some objects with a lab simulation to determine their density and to see how density affects the buoyancy of an object.

Information

You will be using an interactive web site to test several objects. Click on the link for the site : Density Lab

 - Choose one object at a time. Place in the bottom of the scale. Record the mass in your lab book.

- Place the object in the graduated cylinder to find the volume. Record in lab book.

- Calculate the density of the object to the nearest tenth and record in book.

- Place the shape in the pail of liquid to see if it floats or not.

- After you are done testing all objects, answer the analysis questions.
 

Activity

1.    Select a shape. Determine the mass and volume of the shape. Record in lab book.
2.    Calculate the density of the shape and record in your lab book.
3.    Place the shape in the pail. Record if the shape floats or sinks
4.    Answer the analysis questions in your lab book. Answer in complete sentences.
 

Questions - answer in sentence form in your lab book.

1.    Which object had the highest density?

2.    How can you tell if an object will float in water by looking at the density of the object?

3.    If the density of the liquid was changed to 2 g/mL instead of 1 g/mL, how would your data change?

4.    The density of water is 1 g/mL. Does the density of water ever change? Explain your answer.