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Science fun! (always adding)

colored ice and oil
in a ice cube tray make a ice cube or two of little water mixed with a lot of food coloring. Once frozen get a cup of oil and drop the cube in the oil watch as the cube melts and noticed the food coloring does not mix with the oil. find out why it doesn't mix here-http://wiki.answers.com/Q/Why_does_food_coloring_not_spread_in_oil_but_in_water

One of the most popular experiments of modern times is the Diet Coke and Mentos Geyser. Made popular by Steve Spangler, this experiment is a lot of fun and sure to amaze your friends and family (assuming you do it outside rather than in the living room).

Make a Tornado in a Bottle
Learn how to make a tornado in a bottle with this fun science experiment for kids. Using easy to find items such as dish washing liquid, water, glitter and a bottle you can make your own mini tornado that’s a lot safer than one you might see on the weather channel. Follow the instructions and enjoy the cool water vortex you create!
What you'll need:

Water
A clear plastic bottle with a cap (that won't leak)
Glitter

Dish washing liquid

Instructions:

Fill the plastic bottle with water until it reaches around three quarters full.
Add a few drops of dish washing liquid.
Sprinkle in a few pinches of glitter (this will make your tornado easier to see).
Put the cap on tightly.
Turn the bottle upside down and hold it by the neck. Quickly spin the bottle in a circular motion for a few seconds, stop and look inside to see if you can see a mini tornado forming in the water. You might need to try it a few times before you get it working properly.

What's happening?

Spinning the bottle in a circular motion creates a water vortex that looks like a mini tornado. The water is rapidly spinning around the center of the vortex due to centripetal force (an inward force directing an object or fluid such as water towards the center of its circular path). Vortexes found in nature include tornadoes, hurricanes and waterspouts (a tornado that forms over water).

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So neat!