Applied Science - Science and Math (4B) Lab

PROBLEM:  How can a science experiment be both qualitative and quantitative?

PREDICTION:

MATERIALS:  25 ml graduated cylinders, baking soda, measuring spoons, vinegar

PROCEDURE:  Follow the steps below.  Record your data and then graph the results.

TRIAL 1.  In one graduated cylinder put 1 ml of baking soda; slowly add 5 ml of vinegar.  Students may stir the liquid gently.  Record what happens (below).  After it stops fizzing, add another 5 ml of vinegar.  Record what happens.  Continue adding 5 ml of vinegar until there is no more fizzing.  How many milliliters did you use?

TRIAL 2.  In one graduated cylinder, put 1 ½ ml of baking soda and repeat the experiment above.  Record your data.

TRIAL 3.  In one graduated cylinder, use 2 ml of baking soda and repeat the experiment above. Record your data.

DATA (State whether it fizzed or not, any odor, etc.)

 TRIAL 1 TRIAL 2 TRIAL 3

Make a bar graph of these results.

CONCLUSION:
Which portion of the experiment was qualitative?

Which was quantitative?

If you add more baking soda would you add more or less vinegar?