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Create a Science Project for 7th Grade or Middle School
Did you know that the iron in your boxed or bagged cereal is called elemental. This is because it is not combined with any other chemical. This iron is sprayed on the outside of your cereal. But you are able to separate the iron with a magnet. HOW DO I DO THIS?Get a postage scale or a small scale that can measure grams and ounces. You can borrow one as well. Don’t use your bathroom scale it won’t work! Put 1/2 cup of one type of cereal in Ziploc bag, and crush only until they are about half of the starting size. Put in a large bowl. Do this for each type of cereal you are testing. Now get really hot water and pour 1 cup in the first bowl and mix with a wooden spoon. You will do this for each bowl but only do one at a time. You need a magnet and a strong one if you can get a bar magnet about 2 to 4 inches long it would be the best. Tie a string around the magnet and put in the water. You don’t want the magnet to touch the sides or bottom but you want to swirl it around in the cereal. Do this for about 5 minutes. Try not to use a grey or black magnet because you won’t be able to see the iron. If you can only find grey or black you will have to scrape of the sides to get the iron off. Remove the magnet and scrape off the iron onto a napkin. Weigh the iron on the scale and record your findings. Do this for each bowl of cereal to determine which has more. Your hypothesis could be that you think corn flakes contain more iron than chocolate puffs. This 7th grade science project can be fun because it used items from around your household.
NEW EXPERIMENT: Take pieces of fruit or vegetables and test to see which one turns brown first. This is oxygenation and when you expose fruit or the inside flesh of some fruits and vegetables to air which is oxygen they do what is called oxidation and will start to turn brown. This does not mean they are deteriorating in any way and it does not mean you cannot eat the brown part of the fruit. They are perfectly fine. It is just a chemical reactions to the exposed fruit. Let's get together our materials: 1 potato 1 banana 1 apple 1 pear Now with a knife slice each one in half and place them skin side down on a paper towel. The cut section is facing up into the air. Come back in 30 minutes and record on graph paper what you see from each fruit or vegetable. Come back in another 30 minutes and do the same thing. Now for the next one wait 1 hour. Make a visual observation of the fruit and write it down. Lastly you will wait two hours more. View all the fruit. Did some fruit get to a certain point and stop turning any more brown? Did another fruit or vegetable continue discoloring? Why did this happen/ Take your discolored fruit to your science fair to show what happened in the experiment or take pictures to paste onto a poster board.
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