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Chemical sciences/Chemical effects of electric current
Chemical sciences/Basics of chemical reaction
 initially involved in a chemical
eaction are called reactants or reagents. Chemical reactions are
usually characterized by a chemical change, and they yield one or
more products, which usually have properties different from the
reactants )
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Chemical sciences/Atoms and molecules (2)
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. In this system, the process of digestion has many stages, the first of which starts
in the mouth (oral cavity). Digestion involves the breakdown of food into smaller
and smaller components which can be absorbed and assimilated into the body.)
 to settle in place.)
Biological sciences/Reproduction in animals
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Biological sciences/Reaching age of adolesence
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