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Science Fair Projects for 4th Grade

400 award winning science fair projects here. Try one of these proven winners for your next science fair. Make science fun with a winning project. What holds your interest -- living green & the environment, astrology, aircraft? There is a great science fair idea in all these topics. The trick to a winning science fair project is to choose a topic you like and find a project to match it. Take a look at these fun science fair project ideas. Start your science fair project today. Each science fair project includes about 15 pages of easy-to-follow directions to help you create your project step-by-step.

Also included in each science fair project::

  • Details about the scientific method
  • List of needed materials
  • Detailed list of step-by-step procedures that are easy to follow
  • Vital information on how to make your presentation
  • Details about "What the judges are looking for"

As a bonus, every project includes 16 free original science games that you can play with all your friends!

In addition to these winning science fair ideas, you can choose from over 400 other science fair project ideas. Every subject is covered including chemistry, physics, biology, computer and environmental sciences, and more. Choose it and print it now; start your science fair project right away!


Will varying temperatures affect the amount of rust on a penny, nail, needle and paper clip when submerged in different liquid environments?
How fast will a penny rust? What makes it rust faster - orange juice or soda? Which would rust first - a penny, a nail, a needle or a paper clip? See what develops in this fun chemical project!

400 more winning science fair projects here!


Do different kinds of music such as jazz, rap or classical affect test performance?
Are you getting ready for that test? Do you want to ace it with an "A"? Perhaps some rock or classical music should be playing in the background. This project will help clear the air about music in the background when taking a test.

400 more winning science fair projects here!


Which soft drink contains the most fizz?

Did you ever wonder why soft drinks make you burp? That's because soft drinks contain a gas called carbon dioxide. This experiment investigates the amount of carbon dioxide in different soft drinks.

400 more winning science fair projects here!


Can body language help you determine if someone is lying?

The way people act and the things they do are often in conflict with what they say. In this project you will learn a little about how to discern when body language is not always the same as spoken language and to quantify the difference.

400 more winning science fair projects here!

Where in my neighborhood is it most polluted?
This very enlightening project will help you to determine the most unpolluted area in your neighborhood. It will give you insights of how people are polluting the environment.

400 more winning science fair projects here!

 

Background information about rust that you may find useful for your science fair project.

Rust is the substance formed when iron compounds corrode in the presence of water and oxygen. It is a mixture of iron oxides and hydroxides. Iron is found naturally in the ore, hematite, as iron oxide, and purified iron quickly returns to a similar state when exposed to air and water. This corrosion is due to the oxidation of a metal being an energetically favorable process--energy is given off when rust forms.

When an iron compound comes into contact with a drop of water, an electrochemical process starts. The process of rusting can be summarized as three basic stages: 1) The formation of iron ions from the metal, 2) The formation of hydroxide ions, and 3) Their reaction together, with the addition of oxygen, to create rust. On the surface of the metal, iron is oxidized to iron. The formula for this is:

Fe -> Fe2+ + 2e-

The electrons released travel to the edges of the water droplet where there is plenty of dissolved oxygen. They reduce the oxygen and water to hydroxide ions:

2e- + 1/2O2 + H2O -> OH-

The hydroxide ions react with the iron ions and more dissolved oxygen to form iron oxide. The hydration is variable (with x water molecules surrounding each iron oxide molecule):

Fe2+ + 2OH- -> Fe2O3xH2O

Rusting tends to happen faster at sea. This is due to the higher concentration of sodium chloride ions in the water, making the solution more conductive. Rusting is also accelerated in the presence of acids, and inhibited by alkalis. Unfortunately rust is unlike aluminum oxide, which forms a protective coating on aluminum to prevent further oxidation.

Hydrated iron oxide is permeable to air and water, meaning that the metal continues to corrode after rust has formed. However there exist a number of ways of stopping, or slowing, this process.

Galvanizing is coating the metal with a thin layer of another metal, such as zinc, which forms a protective oxide. The two most common processes used to achieve this are hot-dip galvanizing and electrogalvanizing.

Also used are sacrificial metals attached through a conductor to the metal at risk. As the sacrificial metal is chosen to have a higher electrode potential, it is oxidized in preference to the iron.

Electrons conduct to the site attacked by oxygen and water and reduce oxygen to hydroxide irons as in normal rusting. Because there are no iron ions to react with the hydroxide ions, no rust is formed. Other techniques of preventing rust include the coating of the metal in an organic polymer or paint. Unfortunately, these are not so powerful. If the surface is scratched, the metal is exposed and rust can still form.

4th grade science project

 

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