| To Determine How the Gulf of Mexico Gets Its Salt . . . |
| MATERIALS NEEDED: |
- 2 Paper Cups
- Dirt
- l Sheet of Black Construction Paper
|
- Coffee Filter
- Measuring Spoon, Tablespoon (15ml)
- Modeling Clay
|
|
| |
     |
| |
|
|
|
1. Punch 6 holes in the bottom of a paper cup with the point of the pencil.
2. Place the coffee filter inside the cup.
3. In the empty cup, mix together 1 tablespoon (15 milliliters) of dirt and 1 tablespoon of salt.
4. Pour the dirt-salt mixture into the cup with the filter paper.
|
5. Place the sheet of black construction paper on the plate.
6. Use the clay to make short legs to support the cup above the black paper.
7. Pour three spoons of water on top of the dirt-salt mixture.
8. Allow the water to drain out of the cup and onto the black paper.
9. Allow the paper to dry. This process is speeded up if the paper is placed in the sun.
|
|
|
RESULTS: White crystals of salt form on the black paper.
WHY? As the water flows through the soil, the salt dissolves in it and collects on the black paper. As the water evaporates from the paper, the dry salt is left behind. In nature, rainwater dissolves salt from the soil. If this water finds its way to
rivers that flow into the ocean, the salt is added to the ocean water.
|
|
To Demonstrate How Salt Content Is Measured . . .
Return to the Kid Connection Table of Contents
|