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__DENSITY AND BUOYANCY__.
== What is density? Density is a measure of the quantity of some physical property(usually mass) per unit length, area, or volume.(usually volume) media type="youtube" key="5QWXLZ91DUM" height="453" width="599" align="right"==

__Sink ................____Float__
rocks..........................................brocoli regular soda with sugar in it..........tennis balls metal ball....................................oil nail polish...................................paper money earrings......................................styrofoam coins..........................................erasers socks.........................................air eggs..........................................ducks!

[[image:Screen_shot_2011-04-28_at_8.12.31_AM.png]] Buoyant force= wieght of displaced water. How ever much water is displaced, if you were to measure it, that would be the buoyant force.
=== When you put something in water, the object is pushing water out of the way so it will fit (displacement) The buoyant force pushes it up so it wont sink. How ever much displacement of water there i, thats the buoyancy force. ===

= EXPERIMENT TIME!!!!!!!!!!!!! Provided by SteveSpanglerScience.com = = For density, make a density bottle! theyre fun to make, easy, and made out of household items you probably already have =

**How it works is that you put some liquids in a bottle that have differant densitys. The less dense liquids will float towards the top. The liquids with a higher density (meaning it weighs more) will sink to the bottom. The ones that are inbetween will just hang around the middle..... See the green liquid appears to be less dense because it is floating because it wieghs less. The blue liquid is a little bit more dense that the green liquid. the red liquid is more dense than the blue liquid, making it closer to the bottom. the yellow liquid is the most dense placing itself at the bottom. You can use anything at home to make this. Such as vinigar, cooking oil, vegetable oil, dishsoap,** **syrup, and even honey. anything that has diverse densitys will work.**



** For buoyancy also, you can do an experiment on what objest float, sink, or flink! **

**The diet sodas float because diet sodas have alot less sugar wieghing them down than regular. and because all that sugar is gone, that means it is less dense.** the regular sodas sink down because of all the sugar that wieghs it down, making it more dense, or should i say heavier.

This expiriment will work with anything except anything electronic. dont put anything electronic in water unless you want to be electricuted. like this : so unless you want that < then i suggest you use more non-electical friendly things. like erasers, rocks, paperclips, markers! plastic, styrofoam, things like that!

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