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 My World of Science primary 6 (เเปลไทย)

6. Energy

A. Sources of energy

–  Renewable sources
             •  Solar energy
             •  Biomass
             •  Wind
             •  Flowing water
–  Non-renewable sources
             •  Fossil fuel
             •  Nuclear power

B. Forms of energy

–  Potential energy
–  Kinetic (0r motion) energy

C. Conversion of energy

–  Other energy conversions

7.  Forces

A. The effects of a force

B. Different Types of Forces

–  Gravitational force
–  Frictional force
             •  Disadvantages of friction
             •  Ways to overcome friction
             •  Methods of increasing friction
–  Elastic spring force
–  Magnetic force
             •  Uses of magnets

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My World of Science P.6