The topic for today is to pick three cell parts and describe what each of their functions is.  So the first two parts of the cell (organelles) that I will describe are the chloroplast and mitochondrion.  These organelles work together in a plant cell to make food for the cell.  The chloroplast uses the energy of the sun to create food in the form of glucose.  Then the glucose goes to the mitochondrion which breaks down the glucose to realease the energy from it.  This is how a plant cell gets its energy.  In animal cells, the mitochondrion is also used to break down food, but the cell doesnt get food from the sunm, so there is no chloroplast.

The other organelle I will describe is the vacuole.  A vacuole is like a storage tank and holds most of the cells water and other materials.  Animal cells barely have a vacuole, but in plant cells the vacuole is huge.  If a plant's cells didn't have a vacuole the plant would shrivel up and die.

In our science class there are rats and during the first quarter they had babies.  We started measuring and weighing them on the third day of their lives.  The first time we weighed our rat, it weighed 7.6 grams, it's tail was 20 millimeters, and the circumfrence of it's head was 50 millimeters.  We also measured them on the sixth, ninth, thirteenth, and forty-fifth day.  The ratio between the tail length and the circumfrence of the head was always changing and I kind of saw a pattern.  Evey time we measured the rats, the length of the tail got closer to the circumfrence of the head, which meant that the tail was growing faster than the head.  By day thirteen, the tail was 50 millimeters long and the head's circumfrence was 62 millimeters.  But after day thirteen we didn't measure them again until day 45.  By this time the tail had grown to 110 millimeters,  and the head was 75 millimeters.  So as you can see the tail was growing much faster than the head was.

Science during first quarter has been a lot of fun and full of cool labs where we learned a lot.  We have done labs about air pressure such as the egg in a bottle experiment, we have looked at how sugar affects the mass of and object when we did the gum lab, and we have looked at things up close under the microscope like when we looked at onion cells.  These were all fun and interesting, but my favorite thing that we did in science was study the development of the baby rats that were born in our classroom.  There are a ton because there are three female rats.  We basically got to see some of them being born which was cool. Then we started weighing and measuring the rats every few days to see how they grew.  It has been a lot of fun and now, weeks later, the babies are ready for adoption.  This was my favorite part of science during this quarter.

Today, for my science solution, I will be explaining the difference between a  A prokaryotic cell does not have a nucleus or any organelles.  It is a primitive and is common in bacteria.  Prokaryotes also have ribosomes and are about one tenth of the size of a eukaryotic cell.  A eukaryotic cell has a nucleus and organelles.  They are much more advanced than prokaryotic cells and are found in plants and animals.  THey are about ten times the size of a prokaryote.  These are the main differences 

Cells are very confusing to me but I will try my best to explain why you cannot feel cellular activity even though you know your cells are alive and functional.  First of all, you know that your cells are working because you are alive.  If your cells weren't working you would not be alive.  Cells are what make up all the organs of your body and if they weren't there then your body would not be able to funcion.  And that is how you can know that your cells are alive and functional.