Ok, this one is for the second years but anyone will find the information interesting. A shadow is formed when an object obstructs the path of light rays falling on a surface. We started looking at the phenomenon of eclipses in class. Now for personal interest, what about the every day changes in the shadows on the moon's surface. Impress your parents with this one! Visit the link below.

The Phases of the Moon

In class today a student commented on a news report in the newspaper about a woman that had two wombs. That took me completely by surprise. So just in case any od you missed the articles you can find them here.Quite fascinating! Feel free to post any comments.

How Pregnancy Occurs in A Double Womb (How Stuff Works)

Triplets For Woman With Two Wombs

Woman With Two Wombs Tells of the Joy Of Giving Birth to Twins

Contraception has become increasingly important to this career oriented generation. See what is in the works to get the male to play a more active role in hormonal control.

Take the Pill

Ok 5ths, We have started out lookign at the structure of the male reproductive system. I found an animation that should help you to properly visualise this key event in external fertilisation.

Pathway of Sperm Release

During an Integrated Science class today a student asked this question. Here is a link that will supply the answer. Knowledge is power!


Fibre Optics And Light

Cherise asked for some help in explaining the countercurrent mechanism of venitlation in bony fish.

As a fish swims a current is generated in the OPPOSITE direction to that in which the fish is moving. Somewhat like the aerodynamics over a moving car. As water is taken into the mouth of the fish it flows over the gills in the manner described above.
Now the blood in the circulatory system of the fish in order to be reoxygenated must flow back to the gills. This happens to be in the same direction therefore in which the fish is swimming. Deoxygenated blood returning to the gills encounters oxygenated water passing over the gills. There is therefore a very large concentration gradient and oxygen diffuses out of the water and into the blood.This is why the blood becomes increasingly oxygenated as the water loses its oxygen content.
I will attach an animation of this exchange of oxygen.

Countercurrent ventilation

Hello Students,

It is a New Year 2007 and I want to wish you all the best that this year has to offer. Reach for your dreams with diligence and never give up trying. Failure is quitting!