MOLECULES ON THE MOVE

HYPOTHESIS

What happens to the movement of molecules in a substance when that substance is heated?

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

MATERIALS & EQUIPMENT

LAB SAFETY AND PROTOCOL

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

PROCEDURE

  1. Put 300 ml of cold water in the beaker. Let it sit on the desk a few minutes until the water seems still.

  2. Add 1 drop of food color. Do not stir or shake the beaker.

    What happens to the food color (and why)?

    _________________________________________________________________________

    _________________________________________________________________________

    _________________________________________________________________________

  3. Do you think there would be any differences if the water was hot (and why)?

    _________________________________________________________________________

    _________________________________________________________________________

    _________________________________________________________________________

  4. Try it. Rinse the beaker, then put 300 ml of hot water in it. Let it sit on the desk a few minutes until the water seems still.

  5. Add 1 drop of food color. Do not stir or shake the beaker.

    What happens?

    _________________________________________________________________________

    _________________________________________________________________________

    _________________________________________________________________________

  6. CONCLUSION

    What happens to the movement of molecules in a substance when that substance is heated?

    _________________________________________________________________________

    _________________________________________________________________________

    _________________________________________________________________________




    Go To Table of Contents

    Copyright 1996, D.M.Candelora. All rights reserved. Reproduction for educational use is encouraged.