Inicio tema 7 naturales

1. UNIT 7: MATTER, ENERGY AND ELECTRICITY
1. MATTER
Matter is made up of one or more substances which consist of tiny particles,
called atoms.
There are two types of matter:
 Pure subtances: These contain only one type of component which cannot be
separated into other substances. For example, oxygen.
 Mixtures: These contain two or more pure substances. For example, water.
Furthermore, there are two different types of mixtures:
 Heterogeneous mixture: In these mixtures, the different components can be
distinguished.
 Homogeneous mixture: in these mixtures, the different components cannot be
distinguished.
Pure substance Heterogeneous mixture Homogeneous mixture
ATOMS SUBSTANCE
S
MATTER
PURE SUBSTANCE
MIXTURE
HETEROGENEOUS
MIXTURE
HOMOGENEOUS
MIXTURE

2. 2. SEPARATION OF MIXTURES
FILTRATION EVAPORATION DISTILLATION DECANTATION
Is used to separate
solids from liquids
Is used to separate
solids from liquids
Is used to separate
liquids that have
different boiling
points.
Is used to separate
liquids that have
different density.
In heterogeneous
mixtures
In Homogeneous
mixtures
In homogeneous
mixtures
In heterogeneous
mixtures.
MAGNETISM: when one of the elements of the mixture of two elements is a metal like
iron, you can use a magnet to attract this material.
SIEVE: when you need to separate two solids with different size you can use a sieve.
3. PHYSICAL CHANGES
SOLID LIQUID GAS