Zusammenfassung der Ressource
Chemical and physical changes
- CHEMICAL CHANGES
- Important information
- They produce new subtances.
- Chemical changes are usually irreversible.
- Changes in the composition.
- Types
- Oxidation
- When oxigen combines with
a subtance.
- Example
- Combustion
- Produces light
and heat in the
form of fire.
- Example
- Fermentation
- When carbohydrates are
converted into carbon
dioxide and alcohol or
acids.
- Examples
- PHYSICAL CHANGES
- Types
- Melting
- Ice melts and forms water; the
water can be frozen and
change into ice again.
- Example
- Evaporation
- When a solution, is heated, the
water evaporates and
transforms into a gas.
- Example
- Important information
- Changes in the form
- When two or more substances are combined
- Do NOT produce new substances
- They are reversible