I read this article called The Physics of Santa Claus. It was about how Santa couldn't be real and all the evidence that he couldn't be real. It said how Santa's sleigh had to be really fast to give presents to all the good boys and girls. He would also gain a lot of weight because he would have to eat a lot of cookies and milk. It also said how fast his sleigh would go and that his reindeer would burn and that he would also die because he would burn too.
    I also checked the rebuttals to see how people would respond. Some people said that the calculations were wrong, but they still agreed. I would say that Santa couldn't be real because he would die on the trip. He would also have to have a lot of presents on his sleigh and have to carry a lot of weight. Also, he would gain a lot of weight by eating so many cookies and drinking a lot of milk. Still this article was really funny.
    If he were real, then it would be pretty impressive for him to still be alive after Christmas. I wish Santa was real because he would give presents to the good people. My family already knows that Santa Claus isn't real. I'm pretty sure that everyone in the world knows that Santa Claus isn't real. It's just my opinion.

    In science, we learned how DNA replicates. DNA replicates during interphase. When DNA replicated, it splits down the middle like a zipper does. After it splits down, you have two strands of DNA. Then to fill in those empty spots, floating nucleotides in the cytoplasm fill in those spots. It has to match with the old DNA. For example, if cytosine is there, then guanine fills in that spot. After that happens you get two new DNA helixes.
    What I learned was how DNA replicates. One scientist named Erwin Chargaff made Chargaff's rules. The rules state that adenine always pairs up with thymine. Guanine always pairs up with cytosine. Then mitosis happens after interphase is completed. 

    In science, we are learning about the structure of DNA. DNA contains information for the cells. DNA looks like a double helix, a twisted ladder. When DNA has to make copies of itself, it unzips like a zipper and makes two DNA helixes and uses nucleotides to make it. DNA contains sugar and phosphate groups. Cytosine all ways pairs up with guanine Adenine always pairs up with thymine. DNA also contains hydrogen bonds.
    What I learned was how DNA makes copies of itself and what DNA contains. The people who discovered DNA were James Watson, Francis Crick, Rosalind Franklin, Maurice Wilkins, and Erwin Chargaff. These people were the first to discover DNA. Rosalind Franklin was the first to discover DNA and two forms of it, A and B. She also made a photo that was a picture of DNA and was called Photo 51. She thought that DNA had a spiral shape to it.

    In science, we are learning about how cells make new cells. Cells use a process called mitosis. Mitosis has 4 phases. They are prophase, metaphase, anaphase, and telophase. Interphase is where the cells make copies of their DNA to begin mitosis. Next mitosis begins with prophase where spindle fibers appear. Then is metaphase where the nuclear membrane dissolves. Then is anaphase where chromatids move away. Finally telophase is where the nuclear membrane forms again.
    What I learned was how cells make new cells and how mitosis works. This reminds me of a time in 6th grade where I learned mitosis. It was after school and my instructor was teaching us about mitosis. She told us how cells make new cells. We were going to be tested on it. When the test came I was nervous. Then in the end I passed the test with a 100% and got a candy bar.

    In science we learned about plant and animal cells and bacteria. Plant cells have a cell wall where as animal cells don't have cells walls. All plant and animal cells have a nucleus, a celll membrane, and cytoplasm. Bacteria is a prokaryotic cell whice means they do not have a nucleus and is only one cell. Plant and animal cells are eukaryotic cells which means they do have a nucleus and a have multi cellls.
    What I learned was that plant and animal cells and bacteria have different parts. Bacteria is a cell, but is a prokaryotic cell. Plant and animal cells are eukaryotic cells, but have different structures. We did a project on this and this was fun.

    In science, we did a project which we had to make a cell. With this experience I learned the parts of a cell and its function. Before this I didn't know the parts of a cell or the function. In our class Mrs. Poole gave us some questions about the cell and it function. Most of the class failed and didn't get the right answer. Even though most of the class didn't get the right answer I think it is worthwhile because this really helped me learn the parts of a cell.
    What I learned was the parts of a cell and its function. This reminds me of a time in 6th grade when my group had to build a cake of Germany. We had to learn the cities and make a cake about it. It was really hard, but we made the cake.

    In science, we are learning different parts of the cell. One part of the cell is the lysosomes. Lysosomes are mostly found in animal cells. Lysosomes get rid of waste in the cell and provide enzymes for digestion. This part is important to the cell because if the cell doesn't get rid of waste then the cell will die.
    Another part of a cell is the cell membrane. All living cells have cell membranes. Cell membranes control what comes in to the cell and what goes out. This part is important because it helps keep out unwanted particles and lets in important things.
    Another part of the cell is the nucleus. All living cells have nucleus. Nucleus contain DNA. Nucleus also helps promote cell growth. Without the nucleus the cell wouldn't grow.

    When baby rats grow, their body changes. When the rats are born, their head is bigger than their body. Then about two weeks later, their body is bigger than their head. The ratio of their head to body is 2:1 when the rats are born. After the two weeks the ratio of their head to body is 1:2. 
    What I learned was that baby rats head get smaller than their body because they are growing and developing. Since the ratio is 1:2 when the rats are fully grown, this means that the rat is developing.

    In science, we have done a lot of activities for the first quarter. My favorite activity of the first quarter in science was By Golly By Gum By Time. This activity was to see if the mass of the gum would increase or decrease over time when we chewed it. I said it would increase because all the saliva was being absorbed in the gum. Every two minutes we would weigh the gum and check the gum's mass. I was wrong because the gum's mass decreased. It decreased because the saliva was breaking down the sugars in the gum.
    This activity was to teach us how to measure mass with a triple beam balance.   

    In science, we learned the 6 characteristics of living things. One of them was that all living things have cells. We really can't see them, but cells are hard at work. We can't feel cellular activity because we can't see them to the naked eye. Still cells are hard at work because it keeps humans running. Cells use energy from food to help them keep working. Scientists have wanted to see cells in action, but they don't have the right technology.
    What I learned was that cells are hard at work even though we can't see them. Cells can't be seen to the naked eye. They can only be seen with a microscope. Cells get their energy from the food we eat.