February 25, 2014
Here are statements of what students need to know for the multiple choice test:
The cell mambrane is a bilayer of molecules that have a head and 2 tails.
The head of the molecule is water loving and the tail area is water hating.
So they line themselves up so the water hating tails are together, sandwiched inbetween the water-loving heads.
There is space between the molecules for Oxygen, water, and carbon dioxide to move into the cell. This movement does not take any energy from the cell.
Some molecules other than oxygen, water, and carbon dioxide can get into the cell through gateways in the cell membrane.
Osmosis is the movement of water across a membrane. This movement of water does not require any energy for the cell. It happens all the time.
The water moves from where there aren’t many molecules (sutff) in the water to where there is more molecules (stuff). For example, a cell placed in salt water will lose water to the salt water because there is more “stuff” in the water so the cell shrinks. A cell placed in plain water will swell because the plain water has less molecules in it than inside the cell so the water moves from outside the cell into the cell.
February 13, 2014
Students are to make a model of a cell. It can be a plant cell or an animal cell. They need to include at least 10 parts of a cell. Each part needs to be labeled and tell what that part does or they need a key giving that information.
The model may be a poster, an actual model, or be done using an app on the iPad. Students need to go beyond just a drawing of a cell with the labels and what they do if they want to earn an A. If students use an app, they need to be able to turn it into me in Showbie. So be sure that the app allows Showbie.
Some ideas of how to have a project that could earn an A are to make it artsy- beautiful. Use some kind of art technique to turn the cell model/drawing into a work of art. This would be beyond coloring – maybe it is a collage of scrapbook papers or have paper flaps or pop ups or 3D elements.
Another idea is to do an analogy. Show how one of your favorite things is like a cell. My example was with quilting. So I would show how each part of the cell is like some part of making a quilt. Or use a theme, like Star Wars and show how the parts of the cell are like parts of Star Wars (for example, the cell is like the Death Star, then what is the nucleus? What provides the energy?)
This assignment counts as a double the homework assignment (20 points). It is intended to practice the standard while getting to use or do something that is fun or interesting.
Students who don’t have science on Friday can turn there assignments in that day anyway or turn them in on Thursday when they have science.
February 5, 2014
February 4, 2014
Use this link to learn more about the cell membrane and how it controls what goes in and out of the cell!
February 4, 2014
We are using Chapter 3 right now . . . cell structures. There is a vocabulary list there to help you with what to know.
January 30, 2014
Use this link to see into a cell and see a 3 dimensional model of an animal cell and a plant cell.
January 16, 2014
In class on Thursday and Friday, Jan. 16th and 17th, students are going to do a Webquest to find evidence that living things are made of cells. Here are the questions for the webquest. The assignment will be done using Keynote on the iPads and turned into Showbie.
What scientists are credited with developing the Cell Theory? When did they do their work?
When was the word cell first used? By who? What was he looking at when he used thought of calling them cells ?
Who first saw living cells? When? What kind of cells did they see?
When was the compound microscope developed? By who? What did it look like?
January 15, 2014
This is the link to use for the Cels Alive website: http://cellsalive.com/cells/cell_model.htm
January 15, 2014
If you want to try and improve your grade on the quiz on the Interactions between Organisms, you can retake it on Thursday or Friday, which every day you have science class. Scroll down the blogs to see some practice questions to help you warm up again.
Here are the kinds of relationships that the quiz covers (which are also listed on that other blog from when we first took the quiz). Symbiosis, Mutualism, Commensalism, Parasitism, Predator/Prey, Competition, Primary Consumers, Secondary Consumers.
January 13, 2014
Pinto beans or speckled navy beans
Black eyed beans (or also called peas)
Yellow and green split peas
Red kidney beans