Hold up a ball of clay about the size of a ping pong ball and ask students if they think it will sink or float in water. Place the clay in the water. Do you think that if I use ½-the amount of clay ...

These “moss balls” are popular pets in Japan ... because light penetration decreases with water depth, floating allows all marimo be exposed to bright light. Although it’s unclear how ...

The float arm controls the water level in your tank. If it’s set too high, water will keep running into the overflow tube. For ball floats, gently bend the rod downward to lower to adjust the ...

Do Olympic water polo balls float? Balls used in Olympic water polo float, allowing easier ball movement for players. It is made of waterproof material and contains certain textures to allow players ...