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6TH GRADE SCIENCE FAIR EXPERIMENTS

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6TH GRADE SCIENCE FAIR EXPERIMENTS Powered By Docstoc
					    6TH GRADE SCIENCE FAIR EXPERIMENTS

1. Samual Aschik
Heat and Evaporation
What is the effect on evaporation rates when water is placed under different wattage
bulbs? (25, 40, 60, 75, Control)
Variable: wattage of light bulb
Three key parts to evaporation are heat, humidity and air movement. Heat will affect the
rate of evaporation. The molecules of a hot fluid are vibrating more frequently and with
more energy than in a cool fluid.


2. Philip Boyd
Active Volcanoes
What amount of vinegar causes the biggest eruption? (1/8, 1/4, 1/2)
Variable: amount of vinegar
The lava is the result of a chemical reaction between the baking soda and the vinegar. In
this reaction, carbon dioxide gas is produced, which is also present in real volcanoes. As
the carbon dioxide gas is produced, pressure builds up inside the volcano until the gas
(made by the dish detergent) bubbles out of the volcano.


3. Clara Denny
Smell and Taste
Does smell affect taste?
Variable: smell
Seventy to seventy-five percent of what we perceive as taste actually comes from our
sense of smell. Taste buds allow us to perceive only bitter, salty, sweet, and sour flavors.
It’s the odor molecules from food that give us most of our taste sensation.


4. Aleena Escamea and Tabbitha Ninham
Pop Rocks
Which fruits citric acid will make the pop rocks fizz more? (lemon, lime, orange,
grapefruit or pineapples)
Variable: fruit’s citric acid
Pop Rocks are made with corn syrup, sugar, lactose, flavoring and compressed carbon
dioxide. When you add the citric acid, the sugar dissolves and the citric acid and
compressed carbon dioxide combine, releasing the carbon dioxide and producing a fizzy
sensation.
5. Florence John
Egg in a Jar
How many matches do you have to light in the jar to cause the egg to be pushed into the
bottle?
Variable: number of matches
As the air in the jar is heated by the fire, it begins to expand. As the air begins to cool
and contract, the egg seals the bottle. There is then less air in the jar causing unequal
pressure to occur between the air in the jar and the air outside the jar. The greater air
pressure on the outside pushes the egg into the jar. When the egg enters the jar, air
pressure is equalized.


6. Saquoia Metoxen
Fizz Pop
Out of Root Beer, Coke and Mountain Dew, which soda makes the most fizz.
Variable: the brand of soda
When we open a can of soda, we release pressure. It gains the energy to separate gas
molecules and water. The room temperature enters into the bottle and the drink starts
getting warmer quickly. Carbon dioxide also gets warmer and starts rising towards the
surface in the form of bubbles because it has gained kinetic energy. After reaching the
surface these bubbles pop.


7. Sonny Nacotee and Quanah Pocan
Alum Vs. Salt Crystals
Which crystals will grow bigger, alum or salt crystals?
Variable: materials used for two different types of crystal
Crystal size is a relation to the rate of crystal growth. This demonstrates the processes of
dissolution and crystallization. The shapes of crystals of salt and alum are quite different.
The salt crystals will be cubical and most of the alum crystals will be various
octahedrons. Salt crystals are considerably smaller than the alum crystals. This probably
is a function of the kinetics of crystallization.


8. Michael Robinson
Solar Power
Which energy source, the light bulb or sunlight, will make the fan run longer?
Variable: energy source
More and more companies continue to look to this renewable energy source as a low-risk,
high-return investment. As the demand continues to grow, so does the demand for
greater efficiency and effectiveness when it comes to solar power.
9. Yakira Tate
Melting Chocolate
How does the temperature of chocolate change the melting time?
Variable: temperature of the chocolate
Relate to topics such as global warming. Example: Ocean water traps and absorbs heat.
The more energy it retains, the warmer it gets. The result is that each mile of ice that
melts, melts faster than the mile before it which makes the remaining ice melt quicker.
Less ice means more heat which leads to even lesser ice.


10. Alison Torres
Mentos and Soda Eruption
Is the eruption the same height with Diet Root Beer, Diet Mountain Dew and Diet Dr.
Pepper as it is with Diet Coke?
Variable: brand of soda
This is the Surface Effect. Carbon Dioxide forms bubbles. Diet Coke has more carbon
dioxide than other regular sodas. The surface of the Mento is jagged and filled with
nooks and crannies. The carbon dioxide finds all of these holes and fills them with
bubbles. Since the Mentos are heavy, they drop to the bottom of the bottle forming
bubbles all the way down. This is what causes the fast and furious explosion out of the
top of the Diet Coke bottle.


11. Sadie Wilber
Filtering Water
Which of the four substances will clean and filter water better? (sand, pebbles, uncooked
rice, or cotton)
Variable: substance used to filter the water
A water filter removes impurities from water. Filters use sieving, adsorption, ion
exchanges and other processes can remove particles much smaller than the holes through
which the water passes.


12. Brandon Barnes
Glowing Jell-O
Will the Jell-O still glow if I use tap water instead of tonic water?
Variable: type of water
Jell-O will glow bright blue under a black light. This is the fluorescence of the quinine in
the tonic water.
13. Marissa Cornelius and Senecarose Skenandore
Lemon Juice Rockets
How much baking soda do you need to make the cork fly up? (1/4 tsp., 1/2 tsp., 3/4 tsp.,
or 1 tsp.)
Variable: baking soda
Lemon juice and water soak through the toilet paper. The baking soda reacts to produce
carbon dioxide. Carbon dioxide is a gas. As more gas forms, pressure builds up inside
the bottle and sends the cork flying. Lemon juice is an acid, and baking soda is a base.
When they are mixed together they produce carbon dioxide.


14. Lanora Danforth and Mariah Miranda
Soap Bubbles
Does adding other substances to a bubble solution help the bubbles last longer? (corn
syrup, sugar water, glycerin, or lemon juice)
Bubbles are formed when layers of soap film, which are separated by some water
molecules, enclose some air. When the water evaporates, the bubble pops. Polymer
enriched bubbles have been known to last up to ten days without popping.


15. Devon Denny and Sandra Torres-Mejia
Batteries
Which battery will work the best, a lemon battery or a quarter battery?
Variable: type of battery
A battery at it’s simplest is a cathode (the positive end), an anode (the negative end), and
electrolyte (the part in the middle). Electricity is the movement of electrons, really small
negatively charged particles. The lemon battery is called a voltaic battery, which changes
chemical energy into electrical energy. The battery is made up of two different metals.
These are called electrodes, which are the parts of a battery where electric current enters
or leaves the battery. The electrodes are placed in a liquid containing an electrolyte,
which is a solution that can conduct electricity.


16. Taliah Frederick
Slime
What affect does the amount of water have on a slime mixture? (no water, 1/4 cup, or 1/2
cup)
Variable: amount of water
Types of Fluids:
Viscocity – resistance of fluid to a flow.
Non-Newtonian Fluid – a fluid whose apparent visocity changes with applied shear force
Newtonian Fluid – have a constant visocity
Rheopectic – apparent velocity increases with duration of stress
Thixotropic – apparent velocity decreases with duration of stress
(Continued on next page)
    Quicksand, many pastes and glues, gelatin, and ketchup are all non-Newtonian fluids.
There are two main types of non-Newtonian fluids, rheopectic and thixotropic. The slimes,
oozes, globs etc. on this page are rheopectic, which means they show an increase in
apparent viscosity (resistence to flow) with time under a constantly applied stress (they do not
have a well defined viscocity). They resist flow dependent on the velocity of flow. If something
acts on them with a small amount of force (if you stir them slowly, or let you fingers slowly
sink into them) they won't offer as much resistance as they would if a greater force acted on
them. If you punch a good stout ooze, it should resist about as much as a brick wall. They
fight back. Thixotropic fluids, on the other hand, tend to have more apparent viscocity under
low shear stress and less under higher shear stress. Paints typically are thixotropic fluids; they
flow easily when being brushed on, and stay put once applied.




17. Brandon Granquist
Explosion of Color
Which liquid causes the biggest explosion of color? (skim milk, 1% milk, 2% milk,
whole milk, or water)
Variable: liquid
Milt is mostly water, but also contains vitamins, minerals, proteins and tiny droplets of
fat suspended in solution. When you add soap, the weak chemical bonds that hold the
proteins in solution are altered. The molecules of protein and fat bend, roll, twist and
contort in all directions. The food coloring molecules are bumped and shoved
everywhere, providing and easy way to observe the invisible activity.


18. Noelia Ramirez-Gilsoul
Glow’n Slime
What method of storage will make the slime last the longest? (paper bag, plastic
container or zip-lock bag.)
Variable: storage container
Slime will dry out, so it needs to be sealed and refrigerated. It has a limited shelf life and
may eventually develop mold. Zip-lock bags will delay evaporation and dehydration to
preserve newness.


19. Jadin Sitting Bear
Yeast and Sugar Blow Up

Variable:


20. Kwnwahta Smith


Variable:

				
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