The Three Property of Matter

Angela Scott                   WM. T Sherman Elementary School
                               1000 W. 52nd Street
                               Chicago IL 60609
                               (312) 535-1757 

Team Members:  Sandra Broomes & Shelia McKinnon

Objectives:

Students in grades 7 & 8 will be able to demonstrate the effect of salt on ice
Students will be able to measure the temperature of ice
Students will be able to measure the temperature of ice and salt
Students will prepare a graph using the temperatures recorded on their data table

Materials needed:

For each group:
Crushed ice
5 identical containers (2 oz. cups)
5 thermometers that record -20o
5 labels
5 spoons to stir ice
20 grams salt
1 ml measuring scoop

Strategy

Label each cup with a number 1-5
Place crushed ice in each cup to the same level
Stir all the cups
Record the temperatures of all the cups
Add 1 ml of salt to cup #1
Add 2 ml of salt to cup #2
Add 3 ml of salt to cup #3
Add 4 ml of salt to cup #4
Do not add anything to cup #5
Stir all cups again, put thermometers in each cup, and take temperatures 
immediately.
Record temperatures for the next 12 minutes on a data table.
Produce a graph of the temperature over time for each cup.
Use various symbols for the different cups (Dotted line for cup #1, dashed line 
for cup #2, x's for cup #3, o's for cup #4, and a line for cup #5) or use 
different colors of pen (pencil). 

         DATA TABLE  (Temperatures)
                  cups
      _________________________________________
 0    |       |       |       |       |       |   M
      _________________________________________   i
 1    |       |       |       |       |       |   n
      _________________________________________   u
 2    |       |       |       |       |       |   t
      _________________________________________   e
 3    |       |       |       |       |       |   s
      _________________________________________
 4    |       |       |       |       |       |
      _________________________________________
 5    |       |       |       |       |       |
      _________________________________________
 6    |       |       |       |       |       |
      _________________________________________
 7    |       |       |       |       |       |
      _________________________________________
 8    |       |       |       |       |       |
      _________________________________________
 9    |       |       |       |       |       |
      _________________________________________
 10   |       |       |       |       |       |
      _________________________________________
 11   |       |       |       |       |       |
      _________________________________________
 12   |       |       |       |       |       |
      _________________________________________

Performance Assessment:

Objectives: Ability to read a thermometer
            Ability to draw a graph beginning at the middle rather than 0,0
            Ability to conclude that a chemical reaction has taken place
Written Objective:
            Full sentence answers
            The ice became colder as a result of adding salt
Rubric:
            0- No attempt made
            1- Incomplete answers
            2- Complete answer with little information
            3- Complete answer with all information