5. ENERGY CHANGES

CHEMICAL CHANGES: The type of matter changes and a new substance is produced.
- Oxidation / rust: we need oxygen
- Combustion: we burn something
- Fermentation.

PHYSICAL CHANGES: They only affect some properties of matter but the type of matter does not change. A new substance is not produced. There are 2 types of physical cahbnes: of temperature and forces.
TEMPERATURE
Heat causes expansion and contraction of materials
 


Change of state




 





FORCES







Resultado de imagen de forces  Gravitational force



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