Cells, at least once in their "lifetime", reproduce. cells don't reproduce like humans or platns do... the reproduce throught series of steps. The first step to the reproduction of a cell is called the interphase. The interphase in generally where the cell grow to its mature size and starts and makes a copy of its DNA. There are a few other steps but just to get on topic, some cells use mitosis to reproduce. Mitosis, even when used, still has some steps to it. Its basically the same thing. The first step the cell makes a copy of its DNA and grows. The second step the DNA starts to form into little spindle and makes their way toward the center of the cell. After a while, the cell enters the next phase where the spindle go to 2 opposite sides of the cell and pull to rip the cell. After that the cell is ripped and a new membrane forms creating a new cell! It is hard to imagine what life would be like without cells... most likely no life at all! Sometimes it is also hard to imagine that things (cells) that tiny can exist. We always just have to, sometime, think about little living, tiny living, things inside us. They are just they help us saty healthy and strong!
Cells are the smallest functional living unit of all things. We can't see cells with the naked eye because of how small they are but with micropscopes; scientists are able to look at and find things inside cells.
One thing plant cells have that animal cells don't have is a cell wall. A cell wall acts like a barrier between cells and what is outside of the cell. Both animal and plant cells do contain ER or Endoplasmic Recticulum. ER is like a tube in the cell that transports things throughout the cell. Plant and animal cells are very differnt from each other but have many thiings in common. Some plant cell parts are a little different because of what plant do daily, like photosynthesis! Some parts are different because of what they need to do in order to help the plant survive. One thing that is cool about plant and animal cells is that they have most of the same parts just they are located in different places. For example, like buttons on a phone, on different phones the same button is located in a different spot! Of course, now-a-days, we don't really "have buttons" because of all these new iPhones coming out!
These past few days in science were some very fun ones. This past week, in science class, we got to study cells. To add some fun with the study of cells, Mrs. Poole allowed each table (4 people) to create an edible cell. I was so excited!!! My group (table 7) all took part in baking, bringing, and supplying parts to create our edible cell. I had a blast. oUr cell was made out of vanilla flavored cake. Each person brought in sweets and candies to build our edible cell. We labled our cell parts with tooth picks and answered questions from Mrs. Poole about what each part in a cell does. Then, Mrs. Poole took a picture of the cell and gave us our "result To be more focused ont he subject, I didn't really learn from this project. I loved doing it because it allowed each table to get creative in so many different ways, but I didn't learn as much as I'd like to. I think, in the future, that the edible cell project shouldbe done close to the finishing of the unit of cells and living things. I think this because it allows students to reflect on allthey've learned throught the unit and put it altogether to create an edible cell. Thsi project was a blast for me, but I wouldhave prefered it to be pushed back so other and more important things couldbe accomplished. The edible cell was one fun group project for me and I hope the science teachers continue to dO it. After all, this project was allowing more and more student to find fun projects in educational lessons. This project was a great and fun project I hope to do again with something else in science. Even though I did not learn much, there is always time for fun. Even if its at the end of a project or lesson. Good luck upcoming-seventh graders! I hope you get to enjoy this project.
We can't see them, but we know they are there. Even though there are many microscopic things in our bodies and world, these things tend to be some of the most important to our body and world. There are many different parts of a cell all with special jobs to help our body, I would like to write about 3 of them, the nucleolus, the nucleus, and the ribosomes. The nucleus is the cell's brain. It tells the cell, basically, what to do and when to do it, it like the brain for our body just for a cell. DNA or chromantin is found inside the nucleusThe nucleolus is the main enery source for a cell, the nucleolus is found inside of the nucleus right in the center of a cell, most of the time. The last and very intersting part of a cell is the ribosomes. The ribosomes produce protein for a cell, and as we know, protein is very important.
Even though we can't see them, cells and their parts are very important to our bodies "plans." Cells, we know are very important, but what wouplda cell be without it parts. Just like we have parts to our body, a cell being included, cells have parts too! If a cell part didn't function, the cell wouldn't function and then our body would stop working. They all tie together, that is why some of the smallest things ever... are some of the most important.
Baby rats head's and tail's don't really ever "match." A baby rats tail is changing while figuring out the circumference of its head. While being a baby rat, you grow and develop more and more until you've grown to an adult rat. Baby rats are constantly changing so it is hard to determine a ratio of a baby rats tail to the circumference of it head. So the ratio would be constantly changing. To find the circumference of a baby rats head multiply the distance of it's head (one way across) times pi. To find out the measurement of its tail, you would (most likely) use a ruler and measure.
Where baby rats are constantly changing it really is hard to determine a perfect ratio. Once the baby rats have grown into adult rats, then a ratio would be easier to find, but even then rats are still changing. Just not as much. Humans are like this too, so are all other living things. We all change, grow, and develop in some party of our lives... it's one of the 6 characteristics of life. The only difference is... rats can't eat ice cream!
How do you know your living, if you can't feel cellular activity going on inside you? How do you know your cells are working (right) if you can't feel them? What's happening here? Well, you'd know your cells are working if you are feeling normal. If you blink, breathe, cough, sneeze, your cells are working. if your cells aren't working, well, you wouldn't be alive. All your cells work together to makesure your body functions properly. If it doesn't you cells aren't working like they should. Go to your doctor every year to keep up on your health and you'll be just fine!
A lot of people say dogs look just like their owners. Really?! No, no that's just a joke. Sometimes it might seem like that but really, dogs look just like their parents not their owners. Believe it or not, their different! Sometimes their looks might have a twist from their parents, but a lot of the time, they look identical. A lot of childeren and kids today inherit traits or looks from their parents. When animals, humans, or other living things reproduce, their offspring (most of the time) inherit many different traits.
For instance, I have brown eyes and so des my sister. We both inherited that from my mom, who has brown eyes. My dad and my brother each have blue eyes. I have tan skin, and my dad has tan skin.
When living things such as animals reproduce, they normally reproduce in sexual reproduction. That means two parents produce offsrping that carries traits from each parent. Some living things have asexual reproduction. That means one parent produces offsrping that is identical to themselves. We might not think we look like our parents now, but just wait! You'll see!
My first quarter in science class was at first a little hard. With the first week of school and all I was a little nervous. Luckily, after a while I began to understand some things. I mean I had to get back into my school routines, and start my middle school life, but I slowly caught onto things.
I must say that one of my favorite experiments in Science was the "By Golly, By Time, By Gum" experiment. At first we all strted out with a piece of gum, we all chewed our pieces of gum for 2 minutes then set them (on their wrappers) on a scale that meausred the gums weight. After another 2 minutes of chewing, we repeated the whole weighing process.
We all soon found out that after every 2 minutes of chewing, the gum would loose more and more weight. I likes this experiment because we were all able to enjoy some gum, but also fit it into something educational. I sure hope I will be able to do this experiment again and can't wait until my next upcoming science experiment!
It's all around us. Changing things and making things. We don't always think about it... but we should. It's science. This year in middle school we will be learning many things. Where I am a 7th grader, I will be learning about life science. Next year, I will be an 8th grader and will be learning physical science. But for now, I am learning about measuring. In science you always measure in meters and use the metric system.A few days ago we got to measure how far a paper and a card-stock frog would jump. We got to think about which one would jump farther and why. We received our answers quite quickly.
To start, we were handed a paper titled, "Frog Legs". Next we learned about a hypothesis. A hypothesis is what you think will happen, what frog will jump farther. I thought the card-stock frog would jump farther because of how strong it is. After that, we folded two frogs, one made of paper, and the other made of card-stock. Once we were finished folding our two frogs, we were given a meter stick. We had to see how far each frog would jump then average it to get our final answer. My card-stock frog jumped farther, just like I thought it would. Once we finished hopping our frogs into the air, we answered some questions on the back of our sheet.
Science is a fun class! Not to many people realize we're all scientists! We are all learning and observing things!
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