Zusammenfassung der Ressource
Matter, materials and mixtures
- Change
of
state
- We can change the STATE of water from a
LIQUID to a SOLID by freezing it and making
ice. What happens when we heat it? Does it
change state?
- Change
of
shape
- We can BEND, TWIST, PRESS and STRECH
plasticine. The plasticine STAYS IN THE
NEW SHAPE when we stop applying force.
What happens to a rubber band when we
strech it? What happens when we let go?
- Combustion
- When we BURN paper, there is a reaction
called COMBUSTION. The paper changes into
different matter and becomes ASH. Do you
think it is possible to change the ash back
into paper?
- Oxidation
- If you leave your bike outside, the metal
starts outside in the rain for a long time, the
metal starts to turn BROWN and rough. This
isn't dirt - It's called rust. The metal reacts
with WATER and AIR (Oxigen) and
changesinto differnt matter
- Chemichal changes
- Sometimes matter REACTS with AIR,
WATER and OTHER ELEMENTS. These
reactions cause the matter to
CHANGE INTO DIFFERENT MATTER.
These reactions are called
CHEMICHAL CHANGES
- Physical changes
- Matter has different PROPERTIES,
like SHAPE, SIZE and STATE. These
propeties can change. These changes
are called PHYSICAL CHANGES.
- Separating
materials in a
mixtures
- Do you think it is possible to
SEPARATE the different materials in a
mixture? We can separate some
materials in a mixture by SIEVING,
FILTERING or EVAPORATING.
- Mixtures
- A MIXTURE is something that
contains TWO OR MORE
DIFFERENT MATERIALS. Almost
everything around us is a
mixture, including the air we
breathe. In some mixtures we
can see the different materials;
in others it is imposibleto see
the different materials.