A water scale provides a simple way to measure an object's volume -- or to compare the volume of two differently shaped objects. You probably have everything you need in your kitchen to try this easy science activity for kids.
What You'll Need:
- Large bowl
- Baking pan
- Assorted items (apple, rock, etc.)
- Clear measuring cup
Step 1: Place a large bowl in a baking pan, and fill the bowl to the rim with water.
Step 2: Gently lower an apple, a rock, or another item into the water in the bowl. The water will overflow into the baking pan to make room for the object dropped into it.
Step 3: Carefully remove the bowl from the pan, and pour the displaced water into a clear measuring cup.
Step 4: Check where the water level lines up with the scale on the measuring cup to determine the volume of the object.
Step 5: Refill the bowl, and use the water scale to measure another object.
Step 6: Compare the volumes of the different objects.
Get ready for gusts of wind or a gentle breeze. Look on the next page to find out how you can make a wind speed gauge, or anemometer.