Megan's+Science+Page

This is my Science Page.

Here is what I learned during our study of Structures and Mechanisms. media type="custom" key="21099656"

This is our bridge and it could hold 250kg. It got last place and group 6 got first place. I learned that you want to roll the paper really tight and it would be stronger. To improve on the birdge we could of put the paper more tighter.



This is our egg protector, we got second place and group 3 got first place. To make it better I would of used string instead of using rubber bands. When the egg hit the straws that were held in place by the rubber bands, the rubber bands let it go down too far and the egg hit the ground. If we used string, the string would of not let the egg hit the ground first.



This is our house and the roof is a litte bit of a mess. How I would improve on it would be by connecting the walls more to the roof.

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This is my group's picture of iodine mixed with corn starch, sugar and salt. The one on the botom left is iodine mixed with corn starch, when the iodine was put in the corn starch it was really cool how it started to turn black. When we put iodine in the rest, they all turned brown. When we mixed it with wool, the wool rusted

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__EXTRACTION__
The natural resources used are glass ,strings and newspaper. Glass was made out of sand you get from beaches,string was made out of nylon/cotton and nylon is made out of oil. Newspaper is made out of paper and paper is made out of trees. Marbles were made out of clay and clay comes from under the ground. We can plant more trees and help them grow and we can make soil by composting.

__PRODUCTION__
Marbles are a chemical change because they put six layers of melted glass on the marble so it could not break and you can not take the six layers off the marble. It can not be a physical change because you can not take out all of the materials. We are wasting trees, glass,oil and clay. They are polluting the air. They are destroying animals homes and putting the animals in a new place. Then they cut down all the trees.

__DISTRIBUTION__
The marbles get delivered to the stores by trucks. The truck engines produce smoke. They are using a lot of oil.

__USE__
Marbles will last forever or until they get recycled.

__DISPOSAL__
Marbles are disposed of the same way as household garbage. Marbles do not breakdown naturally. Marbles can be recycled. If glass marbles are put in a landfill they won't breakdown. The glass will stay in the ground. Yes the production of marbles is sustainable.

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I learned alot conducting an experment transforming one type of engery into other types of enery.I learned that all energy comes from the sun. For example, I used enery from food to build the rollback can. The transformation is from kinetic energy to elastic energy and back into kinetic. With the balloon car, we transformed kinetic to elastic so all the air comes out of the balloon, and caused kinetic energy which moved the car.