Polarity Of Bonds And Molecules
04 Feb 2008Polarity in organic chemistry refers to a separation of charge and can describe a bond or an entire molecule. Experimentally, bond polarity is measured by its dipole moment. Bonds connecting atoms of ...
ERNEST SENAYA
ERNEST SENAYA:
speeches
What Is Biogas?
04 Feb 2008Biogas is actually a mixture of gases, usually carbon dioxide and methane. It is produced by a few kinds of microorganisms, usually when air or oxygen is absent. (The absence of oxygen is called "anae...
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general-articles
Snow Formation
04 Feb 2008Snow forms if the air in a cloud is below freezing. The water vapour then turns to ice instead of rain and the tiny ice crystals stick together until they form snowflakes. When they get heavy enough ...
general-articles
How The Tilt Of The Earth Produces The Seasons
04 Feb 2008This happens in two ways. The first is to do with how high in the sky the Sun appears. (NEVER LOOK AT THE SUN - your eyes may be permanently damaged.) Think about how the Sun appears in the sky dur...
general-articles
How To Measure Rainfall
04 Feb 2008Rainfall is measured by catching water over a given time, in a suitable jar, usually with a funnel. The tedious part is going out and measuring the amount of water everyday. The task is to devise a wa...
general-articles
The Life Of Dolphins
04 Feb 2008Dolphins have outstanding vision in and out of the water. In the water, their eyes are protected from the sea water by mucus secreted from glands at the outer corner of the eye. Their ears, small and ...
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