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Tides are periodic rises and falls of large bodies of water. Tides are caused by the gravitational interaction between the Earth and the Moon. The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon.
Leaf cells have a special feature: pigment-containing chloroplasts in certain cells that enable them to produce energy and their own food through photosynthesis.
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Blowing, Bouncing, Bursting Bubbles Bubble Bomb - Using baking soda and vinegar, you can pop a plastic bag with the power of fizz. Balloon Blow-Up -Not all bubbles are made with soap!