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.

RATS

10/23/2012

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    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.
 
    In science, we learned that we inherit traits from our parents. In my family, I inherited my mom's brown eyes and hair. I think i look like my dad because I have the right looks like his nose and his ears. Some of my brothers inherited some of my traits. My little brother inherited my looks like my eyes and my nose and mouth and ears. Some people say he really looks like me and I don't agree with it. 
    When you inherit some thing, you pass it on to someone else. For example, when one of your family members die, you inherit what ever they had.
 
    In science class we learned how to find the volume of an irregularly shaped object. For example, if you put a rock in a glass of water, it displaces the water or it makes the water rise. To find the volume if that object, we had to use a graduated cylinder. So say that the volume was 40ml, then when we drop the rock it rises to 60ml. So you subtract the difference from before the rock was dropped, to after the rock was dropped. So 60 - 20 is 20ml. The volume of the rock is 20ml.
    In science class, I learned how to find the volume of an irregularly shaped object. It was kind of difficult before, but now it is really easy. I understood it because she used an example using a graduated cylinder.
 
    In science my class we are studying the metric system. Science isn't one of my strongest subjects, but it is good to learn new things. The most interesting part was learning how the metric system works. There are 10 millimeters in a centimeter and 100 centimeters in a meter. I got confused on where were the millimeters in the ruler. They were the tiny lines in on the ruler. I never really studied science in the 6th grade, but in the 5th grade and that is why science is a  little difficult.
    My class has to study for a test on chapter 1 on the 14 of September. Mrs Poole is going to Washington D.C. because our school is nominated for an award in science and she is going  to be away for one week.