Class of Thursday 18, 2010

Hello everyone,
Here is the link to Moodle, to check homework:
http://zagreb.ceesa.net/course/view.php?id=189

Thursday in our science block we reviewed first of all the Periodic Table of Elements. We learned some symbols for some of the elements on the table because it would have shown up on our Quiz. After that we watched a few videos from Brainpop, (http://www.brainpop.com/) about cellular life, linked here:

1. http://www.brainpop.com/science/cellularlifeandgenetics/cellstructures/preview.weml
2. http://www.brainpop.com/science/cellularlifeandgenetics/activetransport/
3. http://www.brainpop.com/science/matterandchemistry/diffusion/
4. http://www.brainpop.com/science/cellularlifeandgenetics/photosynthesis/
5. http://www.brainpop.com/science/cellularlifeandgenetics/plantgrowth/

After watching the videos, we reviewed pages 32- 37 in our book Science Explorer. Throughout the reading we reviewed the definitions of the following words:

• Diffusion: main method by which small molecules move across the cell membrane.
• Osmosis: diffusion of water molecules through a selectively permeable membrane.
• Selectively permeable: some substances are able to pass through the membrane while others are not.
• Passive transport: the movement of dissolved materials though a cell membrane without using NRG.
• Active transport: the movement of materials though a cell membrane using cellular NRG.
• Exocytosis: movement of proteins leaving the cell across cell membrane.
• Endocytosis: movement of proteins coming into cell across cell membrane.

An example of diffusion.

Also, here is the link to the YouTube video about diffusion and osmosis we had to watch:
http://www.youtube.com/watch?v=K3wG337xmQc&feature=related

One more thing we reviewed for the Quiz is the Mrs Gren method:

Movement
Respiration
Sensitivity
-
Growth
Reproduction
Excretion
Nutrition

This was it for Thursday's class.
The next scribe is Fabi.

Gio