Guadalupe,+J.

__**My favorite things to do**__ My interests are drawing,sketching,and painting. My favorite subject is art. My favorite topic in science are the cells of plants and animals. My least favorite topic is the bodysystem. This year I would like to learn about the difference between plant cells and animal cells. And I'm sincerely looking forward to learn a lot of new things this year in a fun way. :)

__**What I know about science**__
I know that science is used to understand things like the water cycle, the rock cycle, erosion and etc. I understand that science is used to make studies, practices and tests which concernes with the physical world. I know that some of the many fields of science are biology, chemistry and physics just to name a few. I understand that thanks to science the medicine has grown immensly and has helped to control sicknesess like malaria,chickenpoks, yellow fever and even helps to control pandemias. Science has helped to discover things about the prehistoric time like dinosours, human skeletons fossils, different stuff from ansient cultures which has helped us understand the development and the process that the world or the earth has passed on to become what we are today. I know that science has studied the animals and how they adapt to different enviroment changing their habits. Science is the concerted human effort to understand or to understand better. I know that one part of science is astronomy, which is when scientists study outerspace, the stars in the universe and the planets around us. In space if we keep on going in one direction it will never end because space has no end. At least that 's what scientits said. Something very interesting in science these days is that couples can deside when exactly they'll have a baby and even what sex will be and what color the baby's eyes will be. Science is interesting and I always want to learn.

__//**problem statement**////**:**//__ How much weight can plastic wrap hold

__//**hypothesis:**//__ I think that when I test the plastic wrap it would break no matter how I hold it, sience both pieces are made from the same materials it is logic to me that both pieces would break no matter even if the plastic wrap is heated or not.

__//** HOW STRONG ARE PLASTIC WRAPS? **//__ When I started the project I ask some people about what brand of plastic wrap do they buy at the Super Market and to my surprise all of them answer the same way, the cheapest one because I’ve tried all kind of brands but all of them are the same, the only thing that changes is the price. Plastic wraps are not as strong as they seem. Some companies assure that their brand is better and stronger than the other ones but they are all about the same thing. In this project we tested how strong plastic wraps really are and we conclude that when one stretches the plastic wrap very tight it becomes wicker, as an example we tested the plastic wrap by holding it tightly and throwing a six pound weight on it and to my surprise it broke very quickly just at the contact. Then we did the same procedure but in this case we held the plastic wrap less tight than we did with the first one and it barely broke at first contact with the six pound weight, it was just a few seconds later the plastic wrap started to break. When we started the project I thought that no matter how I hold the plastic wrap it would break, since both pieces are made from the same material it was logic to me that both would break. But now that I have done the test I can tell that the difference for the plastic wrap to break or not to break is the way one stretches the plastic wrap. In another test we made, we heated the plastic wrap in order to see if the heat could change the way that the plastic wrap acted when you put weight on it. We heated the plastic wrap for as long as one minute in the microwave. After heating the plastic wrap we held it tightly and through the six pound weight on the heated plastic wrap, and to my surprise it broke faster than before, right at the contact. When we made the test holding the plastic wrap loose I noticed that as soon as the six pound weight touch the plastic wrap the plastic wrap started to look like if it was melting and it broke. It was completely different to the one we made first not heated. I thought that if I heated the plastic wrap it wouldn’t break because the plastic wrap would yield until it cooled down and wouldn’t break, but at the end it happened, it broke. So now I know that heating it won’t make any difference, it just take a little longer to break but sooner or later it will break. We did the same experiment because I wanted to prove differently with another brand, but we did exactly the same procedures using the same weight and the same amount and all I can say is that it happen the same and exact reactions everything was just like the first time. First we worked with the plastic wrap regularly and we saw the same reaction, the plastic wrap with the six pound weight broke as quickly as the first one. We also worked heating the plastic wrap in the microwave as long as a minute just the way we did before, we put again the six pound weight on it and while we worked we could see the same reaction, the plastic wrap yield for few seconds and at the end it broke.

__//** VOCABULARY I LEARNED **//__ Force - is the influence that produces a change in a physical quantity. Elasticity - the tendency of a body to return to its original shape after it has been stretched or compressed. Tension – is the physical condition of been stretched or strained.

__//** INTRODUTION **//__ In this project we will work with plastic wraps. We will see different ways we can experiment on plastic wraps. We will try to prove that the no matter the brand on the plastic wrap it will be the same results. I ask some people about what brands they prefer and we always got the same answer. In their opinion they’re all the same, why pay the expensive brands when you could do the same things with the cheapest one? With this project we will try to prove what people have said, that no matter the brands you buy or how much you pay it will always be the same product or quality.

Independant variable-we heated the plastic wrap, how tight or loose we held it, and how much weight we put on it.

Dependant variable-how weak the wrap got.

Controlled variable-the plastic wrap.