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    Experiment No. 12

    Water Surface Tension 3

    Experiment: To make a mini microscope using a single drop of water.

    Materials:

    You will need:

    Book with fairly small print
    Jar of water
    Small piece of clear plastic
    Eyedropper

    Method:

    1) Place the clear plastic over the print in a book - we used an Irish reader! The plastic is to protect the book.

    2) Using an eye dropper, place a single drop on to the plastic.

    3) Move it about your book and observe what happens. Raise the plastic over the print and see what happens.

     

    Result: The print is bigger when seen through the drop of water. Why?

    Conclusion: Firstly, the water stays as a drop thanks to our old friend - surface tension. Now, light from the book passes through the drop but as it hits the water, it slows down and therefore is bent. As it bends, it forms a lens and the words in the book appear bigger.

     

     


    Fourth Class Experiments

    1. Balancing Clown | 2. Oily Divers! | 3. Flying Counters | 4. Dancing Snake | 5. Chromatography | 6. Bubbles

    7. Slime | 8. Balloon Rockets | 9. Under Pressure | 10. Surface Tension 1 | 11. Surface Tension 2 | 12. Surface Tension 3

    13. Find your 'Blind Spot' | 14. Two eyes are better than one! | 15. Some optical illusions

    16. and 17. More Balancing | 18. Dissolve an egg in vinegar! | 19. Egg Float | 20. Some Paper Airplanes