NATURALES TEMA 7 MATTER , MATERIALS AND MIXTURES

PLASTIC

WOOD

GLASS

PAPER

METAL

FABRIC

CAN YOU TELL ME ANYTHING ABOUT THESE BOTTLES ? THEY´RE WATERPROOF . WE PUT LIQUIDS IN THEM ? .

ANY OTRHER PROPERTIES ? THIS ONE IS SMOOTH .

CAN YOU CHANGE THEIR SHAPE ? MY BOTTLE IS FLEXIBLE . I CAN CRUSH IT .
I CAN´T . IT´S RIGID .

CAN YOU BREAK THEM ?
I´M NOT GOING TO TRY . GLASS IS FRAGILE .
IT´S IMPOSSIBLE PLASTIC IS RESISTANT .

PLASTIC BOTTLE

KITCHEN SPONGE

WOODEN PALLET

RECYCLING PLANT

ROUGH

RIGIT

RESISTANT

WATERPROOF

FLEXIBLE

SMOOTH

FRAGILE

ABSORBENT

MATTER CHANGES
--PHYSICAL CHANGES--
Matter has different properties, like shape ,sice and state .
These properties can change .
These changes are called physical

MATTER CHANGES
--PHYSICAL CHANGES--
CHANGE OF STATE
We can change the state of water from liquid to a solid

MATTER CHANGE
--PHYSICAL CHANGES--
CHANGE OF SHAPE
We can bend , twist , press , and stretch plasticine .
The plasticine stays in the new shape when we stop applying force

MATTER CHANGE
-- CHEMICAL CHANGES ---
Sometimes matter reacts with air , water , and other elements .
These reactions cause the matter to change into different matter .

These reactions are called chemical changes .

MATTER CHANGE
-- CHEMICAL CHANGES ---
COMBUSTION
When we burn paper , there is a reaction called combustion .
The paper change into different matter and becomes ash .

MATTER CHANGE
-- CHEMICAL CHANGES ---
OXIDATION
In the rain the metal starts to turn brown and rough .
This isn´t dirt . It´s called rust .
The metal reacts with water and air ( oxygen ) and change into different matter .

ash

rust

oxideaton

MIXTURES.
A mixtures is something that contains two or more different materials.
In some mixtures we can see the different materials ; in others it is impossible to see the different materials .

SEPARATING MATERIALS IN MIXTURE.
We cam separate some materials in a mixture by sieving ,
filtering or evaporating .

Sieving : Good for separating solids of different sizes

Filtering : good for ,separating ,solids and liquids

Evaporating : Good for separating a solid that in dissolved in a liquid .