Without the phloem, food can not be transpoted to the lower part of the ring, as a result, lower part especially the roots can not receive food and the tree is dying....
Friday, September 12, 2008
Friday, August 1, 2008
Saturday, July 19, 2008
Wednesday, July 16, 2008
Monday, July 14, 2008
Thursday, July 10, 2008
NEUTRALISATION
ACID + ALKALI --> SALT + WATER
A process of adding the correct amount of an acid to an alkali using a burette to get a neutral solution is known as the TITRATION
Wednesday, July 9, 2008
Friday, July 4, 2008
QUESTION BANK
1. Mid year Exam (Form 2 and Form 3- Paper 1)
2. Final year Exam (Form 2 - Paper 1 and Paper 2)
3. Topical Test (Form 1 and Form 2)
++ Pendidikan Moral Form 1 (mid Year exam)
Don't worry...answers will be provided. Just email
Sunday, June 29, 2008
EXPERIMENTS
1. To get more oxygen:
http://link.brightcove.com/services/link/bcpid1550041777/bctid1552694730
2. Heating a baloon:
http://link.brightcove.com/services/link/bcpid687436230/bclid663334378/bctid709364407
3. Emergency glasses
http://link.brightcove.com/services/link/bcpid1321372282/bctid1326153158
Wednesday, June 25, 2008
SCIENCE INFO
Cobalt chloride paper
13. Electrolysis technique can be used to coat a cheaper metal with a a layer of more expensive metal, like gold and silver.
Three steel cathodes (negative pole) are placed in contact with the cannon through a wire mesh, serving as anode (positive pole).
Cannon after treatment.
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William Thomson 1st Lord Kelvin
2. Sir Isaac Newton (1642-1727) discovered the gravitational force. The unit newton (N) is named after him.
Cheek cells
4. Cellulose which is a carbohydrate makes up most of the materials in the cell wall. Humans are unable to digest cellulose. Animals like sheep, cattle, and rabbit have bacteria in their digestive systems to break down the cellulose into simple sugars.
4. Density of an object helps us to determine whether the object is pure or not, as the density of pure substance is fixed. e.g. Pure gold has a density of 19.3 g/cm3. A piece of gold is not pure if the density is either higher or lower than the fixed density. So it is better to check the fixed density before deciding to buy a pure and precious substance like gold.
Hermit crap in a glass shell
6. Oxygen is the most abundant element found on Earth.
Oxygen molecule
7. Carbon is a non-metallic element, carbon has a very high melting point (over 3000oC ) and is also a good conductor of electricity.
8. Nuclear energy are also used to empower large ships and submarines. Some nuclear-powered ships need to be refueled after several years of journey or operations.
A ship empowered by neclear energy
9. James Prescott Joule (1818-1889), an English Physicist discovered that heat was a form of energy. The unit of measuring heat, Joule (J) was named after him.
10. The Sun is about 5000000000 years old and it contains hydrogen and helium.
Monday, June 23, 2008
OPTICAL ILLUSION
Optical Illusion occurs when the objects that we see differ from the actual ones. This due to the failure of the brain to interpret impulses properly when it is disturbed by the surrounding objects or the conditions of the objects.