MIXTURES                 HOMOGENEOUS        WE CAN’T SEE THE SEPARATE SUBSTANCES

HETEROGENEOUS     WE CAN SEE THE SEPARATE SUBSTANCES

IN A HOMOGENEOUS MIXTURE THERE ARE…SOLUTION    SOLVENT  AND  SOLUTE

ATOM IS THE SMALLEST PARTICLE OF MATTER IS EXTREMALLY SMALL AND YOU NEED A ESPECIAL MICROSCOPE SCIENTISTS HAVE FOUND APPROXIMATLY    100  DIFERENT ATOMS EACH ONE HAS A NAME AND IS REPRESENTED BY  ONE OR TWO LETTERS

EXAMPLE

OXIGEN   (O) HIDROGEN   (H) CARBON  (C) GOLD  (AU) IRON  (FE)

MOLECULE IS WHEN TWO OR MORE DIFERENT ATOMS JOINT TOGETHER FOR EXAMPLE TWO HYDROGEN  (H)  ATOMS AND ONE OXYGEN  (O) ATOM

JOIN TOGETHER TO MAKE AN   (H2O) MOLECULE

PHISICAL CHANGES

THE MOLECULES MOVE ABOUT BUT THEIR STRUCTURE DOESN'T CHANGE  We can fold a paper and it changes its shape We can fly a kite and it changes the place We can freeze a yoghourt and it changes the state We can heat milk and it changes the temperature 

 CHEMICAL CHANGES 

In a chemical change, new moleculesare made and the matter is                                                              Rust  new molecules form and make different matter Rust, burns and ferments 

PROPERTIES OF MATERIAL

HARD Materials are very difficult to scratch or cut 

SOFTmaterials  are scratched or cut easily .

 TOUGH materials are very difficult to break FRAGILE break easily Plastic materials are easily to bend Elastic materials go back to their shape

PROPERTIES

Tough materials are very difficult to break

Fragile materials break easily 

Plastic materials are easy to bend 

Elastic materials go back to their shape after we squash or stretch them 

Examples:

Sponge is elastic

Glass is fragile 

THERMAL INSULATOR AND CONDUCTORS

At low temperature, for example in an ice cube, the water molecule move very slowly.

At high  temperature, for example in a cup of tea, the water molecules move quickly. 

LIGHT ENERGY

Light energy is the form of energy that allows us to See things because it bounces off objects and then Enter our eyes

                    LIGHTArtificials light sources

A light bulb, a television

Screen,and a torch change electrical energy

Into light energy

Natural light sourcesStars,a candle and aFire change chemical energy intoLight energy.all the earth`s naturals lightComes  from the sun

               SOLAR PANELS    Solar panels receive energy from the sun .Solar energy is transformed into electric or heat.

                   Wind turbines

Wind turbines receive energy from the wind .wind  Energy is transformed into electricity

                Releasing water 

Releasing water from a dam produces energy hiro Energy istransformed into electricity

                BIOMASS 

Biomass  comes from montly vegetable matter . When burned it produces  bioenergy  . This energy

is transformed into electricity and heat

                   SOUND ENERGY SOUND is the form of energy  that allows us

to hear things because it makes the air vibrations enter our ears 

Sound vibrations travels in waves an in all directions 

Sound travels very fast but much slower than ligth 

                           Examples  Wood

                 MATTER  

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AMAYA  NADIA  MARCOS      AND    DAVID