Tuesday, 24 September 2013

Cell A has entered early interphase. This when te cell carries ot all of the normal life functions of the cell. Cell B is beginning to make the chromosomes into short and thick rods. This indicates the first stages on mitosis or cell division.

The larger cell has fully entered into prophase, where the chromosomes have become thicker and shorter in size. This is when they begin to move towards the middle of the cell.
The C cell has reached the middle of mitosis, which is called metaphose. During Metaphose the chromosomes have been developed into short and thick rods, which move to the centre of the cell into a line.
In this stage the cell D has entered into early anaphase where each chromosome has doubled and the two parts are seperating as they move away from eachother the form into a V shape facing eachother. S is indicating the lower level of the cell where the spindle fibers are fait but can be seen.
In cell E all the chromosomes have now completely seperated, this indicates that the cell has reached te main part of mitosis. This is when the cell produces two duplicated sets of chromosomes. The two new sets of chromosomes are beginning to move further away from each other. The B cells are going into the first stages of prophase.
In cell F two sets of chromosomes are now much further apart now. This is the stage of late Anaphase. Once the two sets get the farthest apart from eachother they willl start to organize themselves into two seperate nucleus. Although the two cells have starting making themselves into nucleus no cell wall has developed yet. 
The is Telophase, the final stage of Mitosis.  Two sets of chromosomes in Cell G have now began to form a dense mass which will become two different nuclues for each new cell. Single chromosomes can no longer be seen. In between the two cells are spindle fiber, where you can see a faint line where the new cell wall will begin to form between the two new cells.
The Cell H shows the very last stage of Mitosis. The cell walls still haven't been fully built between the two cells. The Cell A have finished mitosis, and have moved into interphase. The new nuclui can be seen, and the cell walls have been completely built, which divides the original cell into two completely different cells. The two cells will soon grow in size, and after a point of time they will then begin mitosis again.

Wednesday, 18 September 2013

What is Mutations? Mutations are when there is change in the genetic information (DNA) in the gene.

What causes Mutations? Mutagens are what cause Mutations. Mutagens such as mercury, cigarette smoke, x-rays and UV radiation, and some viruses cause mutations.

Positive Mutation is when a gene mutation benefits the individual. An example of this is when a seven year old girl had lucemia and a scientist injected her with with the HIV virus and it turned out to save her life and kill all the lucemia in the girl.

Negative Mutation is when the gene mutation harms the individual. An example of this is when some poeple are born with curved red blood cells rather than disced red blood cells.

Neutral Mutation is when the gene mutation doesn't affect the individual. An example of this if you have naturally curly or straight hair.

Thursday, 12 September 2013

Favourite Science Video
                       Do Expensive Detergents clean better then cheaper varieties?

Science 9                     Partners: Austin, Jessica and Shae                          Andrena Hilder
Block C
September 10, 2013

Purpose: The purpose of this Lab is to find out which detergent clean better stains in a controlled amount of time.

Hypothesis: I predict Tide Cold Water will make the cloth clean and stain free because the container says that the detergent cleans at lower temperatures.

Materials: Cloth, Ketchup Tide, Woolite, Sunlight, Wester Family, eye dropper, beaker and water.

Procedures: 1. Cut Cloth into 5 strips, and stain cloth with ketchup and let sit overnight.
2. Measure out 10 drops of each different detergent in 200ml of water and mix with room tempurature water.
3. Wash cloth for 3 minutes.
4. Let cloth dry completely.
5. Record you results with pictures.

Observation: Tide: Washed clean with little to no traces of ketchup in the grooves of the fabric, resulting in the best clean of four detergents and water.

Sunlight: The end result of the wash was being able to see the stain more clearly then the tide. Although Sunlight is designed for grease stains it didn;t clean aswell as i thought it would.

Woolite: This product surprised me the most because although woolite is designed for hand washing and is $4's more then the other detergents, it cleaned half as good. You can see clearly where the ketchup stain was and still is.

Western Family: The cloth after being washed was just as clean as when the cloth was washed with Sunlight. There where large to meduim traces of ketchup on the fabric

Water: Washing the cloth is just room temperature is definatley not good enough to clean out all of the ketchup in the cloth. This made the water only cleaning method the least affective.

Conclusion: I conclude by saying that the tide cold water cleaned the ketchup stain on the cloth best, resulting in saying that Tide cold water has the best cleaning power. Water had the opposite result giving the least affect out of the four detergents. The end result of this experiment was that Tide Cold Water cleaned the best and, just water cleaned the worst.