MATTER

Matter is all around us such ussolidliquidgas

IMPORTANT DEFINITIONS:

MASS:How much matter an object has (kilograms,grams…)VOLUME:The quantity of space that an object takes up.

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Solids,liquids,and gases

Matter is all around us .There are three states of matter:Solids,liquids and gases.Solid have a definite shape and a definite volume because they take up the same a space .

Liquids don’t have a definite shape because they adapt to the shape of the container they are in,but they have definite volume because they aways take up the same space.

Finally gases don’t have a definite shape because they adapt at the shape of the container they are in and they don’t have definite volume because they expand to

fill the container they are in.

Physical changesPhysical changes can happen when we heat,freeze,bend,twist,

stretch or squash a substance,or when matter changes shape and changes state but the subs tens doesn’t change.

Physical changes happen to water in the water cycle.

Chemical changes

A chemical change is when a new substance is produced.Chemical changes happen when we burn a substance or

expose something to air.

MixturesWe can classify mixtures as heterogeneous or homogeneous

mixtures.In a heterogeneous mixture it’s easy to see the differentsubstances.In a homogeneous mixture it isn’t possible to see the

different substances.

Natural and manufactured materials

We can classify materials into natural materials and manufactured

materials.Natural materials come from nature and can come from

plants,animals or minerals.Wood,cotton and natural rubber come

from plants.Wool,leather and silk come from animals,and roks and

oil come from minerals.

The three RsIf we take too many of these natural resources,they will run

out.This is why is important to reduce,reuse and recycle.We should try to reduce the amount of materials we use and

the waste we produce.We can reuse many things .For example,we can reuse plastic

shopping bags.Recycle means to make something new from something we

have used.

THANKS!THE END

FROM:IRENE AND DAVID4B AND 4A