Science Class: What We Learned This Week 12/06/08

Hello people of the world=)! This week in science class we learned how to write an explanation! We also studied our super amazing graphs YAY! We talked about the functions of organelles. We talked about DNA too!=)
Our explanations had three parts. The Claim or argument (which is usually your opinion), your supporting evidences (facts) and your reasoning (which connects to your opinion)
We right explanations so we know what we are understanding and seeing and to explain to our audiences so they understand what we are thinking.
For our graphs we talked with our table and came up with conclusions. Here is what our class thought: The greater the growth parameter, the faster the population growth. The greater the initial population the faster the population growth. The more time that passes the more population grows except for when the bacteria reaches a point where the conditions no longer support an increase in growth. It is important that we made conclusions because conclusions help us understand why we did the experiment. Also it is aways good to practice writing conclusions.
Organelles of a cell definitions:
Chloroplasts- absorbs light and makes food for plant cells
Ribosomes-Transcribe DNA into RNA to make proteins
Mitochondria-transforms energy for the cell; has own DNA
(Energy cannot be created or destroyed it can only be transported (transferred) and transformed
Vacuole-stores nutrients and waste removal
Golgi Apparatus-the post office that receives proteins. It tags or checks the proteins and sends them off to their destination
E.R.-Uses RNA to build proteins; transportation route between nucleus and the cell
Nucleus-Contains DNA, brain of the cell; controls cell functions and cell reproduction
Cytoplasim-holds organelles in place
Lysosomes- break down wastes and deal with cell death
Cell Wall-Protective outer layer around the plant cell
Cell Membrane-outer protective portion of a cell that controls what material enters and leaves, keeps together the parts of the cell, protects the cell
Centrosome-composed of two centrioles in the center of the cell and used in cell reproduction
Cilla or Flagella(Flagellum)- specialized parts used for movement; localmotion
It is important to know this so we under stand the importance of how cells move and how they function.
What is DNA?
DNA contains sections of genes. Genes carry what you look like. If you look like your Mom or Dad it is because DNA contains your parent's traits. No one else can possibly have the same DNA not even twins. (unless you are some freaky alien clone=0) DNA is blueprints for your body's cells. Sort of like your cells are construction workers and your DNA is the model for them to build. DNA is Dioxyribose Nucleic Acid. Or 2 oxygen based sugar. The structure of DNA is a double helix. It has two hydrogen bonds that can be seperated and read like a recipe book. This is good to know because it's cool to know how and why things are made.
That's what our class did this week! Go Science! =)