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Chemistry -Study of the composition, structure, properties, and interactions of matter. -Central Science.

BRANCHES OF CHEMISTRY

1. Inorganic chemistry is the study of the chemical nature of the elements and their compounds (except hydrocarbons—compounds composed of carbon and hydrogen). Involves substance that do not contain carbon or substances from non-living things. 2. Organic Chemistry, branch of chemistry in which carbon compounds and their reactions are studied. A wide variety of classes of substances—such as drugs, vitamins, plastics, natural and synthetic fibers, as well as carbohydrates, proteins, and fats—consist of organic molecules. Study of all substance containing carbon in combination of hydrogen, oxygen, nitrogen and other elements. 3. Analytical chemistry is the science of separating complex materials into simpler ones and detecting and measuring the constituents. 4. Physical chemistry is fundamental to all chemistry and deals with the application of physical laws to chemical systems and chemical change. Concerned with theories and experiments that describes the behaviour of chemicals. 5. Biochemistry is the chemistry of living organisms and life processes.

Cell: Compound 1. Protein 2. Carbohydrates - sugar 3. Nucleic acid – DNA, RNA 4. Lipids – fats

SCIENTIFIC METHOD * A logical approach to the solution of the problem.
STEPS:
1. Identify the problem 2. Gathering Information 3. Formulate hypothesis 4. Experimentation 5. Re-evaluate result 6. Draw to conclusion

MATTER = * Pure substance * Mixtures

* PURE SUBSTANCE = homogeneous material consisting of one particular kind of matter. E.g. Sugar, water, charcoal, chalk. * Elements * Compound
Elements = * Metal * Non- metal * Metalloid
Compound = * Organic * Inorganic

* MIXTURES =Is a material consisting of

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