Science Portfolio
Friday, September 16, 2011
Ecology and the nutrient cycle
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Ecosystem It is a habitat which has the community of organisms living in it. Population is the same kind of organisms living in a partic...
Sex Issues
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Birth Control Birth control is the prevention of the fusion of a sperm and an egg. There are temporary birth control methods and permane...
Sexual reproduction in human beings
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Sexual reproduction It is a reproduction which involves male and female sex cells. Male reproductive system The male sex cells are c...
Diffusion and Osmosis
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Diffusion Diffusion is a process whereby a substance moves from its region of high concentration to its region of low concentration. The...
Thursday, September 15, 2011
Cells
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Cells Cells are the building blocks of all living things. Living things can be classified into unicellular organisms (one cell only) or ...
Acids and Alkalis
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The characteristics of an acid: - Sour taste - Able to conduct electricity - Turns blue litmus paper red - Reacts with metals, carbonate o...
Materials
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The process of grouping and sorting out is called classification. Grouping of object in a proper way always help us to do our work effici...
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