Thursday- 09.30.10

Today we took notes on our new unit about cells and finished some of our microscope-cell lab.

Notes

Cell Theory
-all living things are composed of cells
-cells are the basic units of structure and function in living things
-new cells are produced from existing cells

Prokaryotes
-cells that have genetic material that is not contained in the nucleus
ex. bacteria

Eukaryotes
-contains a nucleus in which their genetic material is separated from the rest of the cell
ex. basically every other living thing

Animals cells have centrioles
Plant cells have a cell wall and chloroplasts
Both share many organelles such as a nucleus, cytoplasm, cell membrane, lysosomes, mitochondrion, golgi complex, endoplasmic reticulum, ribosomes, etc.

Microscope Lab:

Cell Structure and Function

For the lab titled Cell Structure and Function on pages 9-14 in our UP, we had to observe 4 different slides. The samples we observed were: an elodea leaf, a human cheek cell, an onion cell, and frog blood. We put drops of iodine, water, and methylene blue on the slides to help us see the details better. Some of the questions we were asked were:

What shape are the cells?

Do they all have the same shape?

How many cells did you see?

Is it prokaryotic or eukaryotic?

We also had to draw a picture and label the parts for each sample. This lab was a good activity to do because it gave us a better understanding of differences between cells.

Deepwater Doomsday: Gulf Oilspill 2010

Sorry it's a little late due to tech problems, but this is the presentation created by Danyal, Junsup, and me. Unfortunately, the spoken narration didn't make it through this format, so please read the video's annotations/captions for descriptions.



Or view here: http://www.youtube.com/watch?v=uNdW-omZyaU

Human Impacts

On Wednesday the 22nd Mr. Paek showed the class a slideshow which we took notes on. One of the main definitions was Biological Magnification.

Biological Magnification- phenomenon in which concentration of certain compounds in organisms of a food chain increases as you move up the food-chain.

We also talked about DDT which is the first synthetic pesticide which kills bed bugs but soon became a wide spread problem. Researchers soon found out that it causes cancer and caused environmental problems.

We then also talked about the GREENHOUSE EFFECT-

-Due to burning hydrocarbons(fossil fuels), rainforest destruction

-Amount of CO2 in the atmosphere increases

-Heat is normally reflected from the earth

Oil Spill (Animals)

The Gulf of Mexico oil spill has had a large impact on many animals overall. The oil can have impacts that range from death to harmful and shocking health damages.

STS BP OIL SPILL

Animals&Oil Spill

They hurt the animals: BP Oil spill

Our class studied the BP oil spill that happened on April 20th, 2010.

We all needed to make videos about our chosen topics.

the topic we chose was the effect of the oil spill on marine life.