Sink Or Float?

Equipment:

• Plastic Container
• Water 3/4
• Table salt
• Teaspoon
• Eyedropper
• Clay

Instructions:

1. Fill the container 3/4 full with water.
2. Put a small piece of clay around the bottom of the eyedropper. DO NOT BLOCK THE OPENING!
3. Float the eyedropper in the water.
4. Now squeeze the bulb of the dropper to let the air out one drop at a time, testing after each drop to see if the dropper will sink.
5. Once the dropper sinks, stir in teaspoons of salt into the water one at a time - until it floats again.
6. Record how many teaspoons of salt it took to make the eyedropper float again.

It took 11 teaspoon of salt to make the eyedropper float again.

Hypothesis: Even a little piece of clay will just make the eyedropper sink in fresh or salt water.

We carried out a Science investigation to find out what affect adding salt to water would have on an object that was weighted down in water.   

The purpose why we did this experiment was to see adding salt to the water will make the eyedropper float again if it sunk.