dimecres, 7 de juny del 2017

METALS

A metal is something hard and strong that can be in different colours and can have different uses.
There are some metals that are a really good conductors of electricity.

There are two types of mertal:
  • NON-FERROUS.....The non-ferrours metals do not contains iron
ALUMINIUM:
Bright white colour, light, oxidation resistant. Containers and metalwork.

COPPER:
Reddish colour, excellent thermal and electric conductor. It is used to make electrical conductors and central heating

TIN:
It has a very low fusion point and is a bluey-white colour and it's very soft. It is very useful for welding pipes and copper cables.

SILVER:
Mainly a natural substance, but mixing with copper create sterling silver. Used for decorative impact in ornaments, and also to solder different metals together.

BRASS:
It's a combination of copper and zinc. Is used for ornamental purposes and within electrical fittings.

  • FERROUS....The ferrous metals contains iron

MILD STEEL:
Iron-carbon alloy containing less than 0.25 percent carbon which makes it more ductile and less hard. Used for engineering purposes and in general, none specialised metal products.

CAST IRON:
Very strong but brittle. Used to manufacture items such as engine blocks and manhole covers.

WROUGHT IRON:
Used to make items such as ornamental gates and fencing.

  • ALLOY.....Metal blended with one or more other metals or non-metallic substances that change its properties and structure.
CARBON STEELS:
Are ferrous alloys that contain carbon and small levels of other alloying elements, such as manganese or aluminium.

BRASS:
Is any alloy consisting primarily of copper (non-ferrours), usually with zinc.

BRONZE:
Any similar non-ferrours(cooper alloy)consisting in other elements in place of tin, such as aluminium bronze, beryllium bronze, etc.



  • NEW MATERIALS ABOURT METALS

MICROLATTICE:
It is the lightest metal ever.

SUPER-HARD METAL:
This metal has been made in a laboratory by melting together titanium and gold. It is four times harder than titanium.
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dijous, 18 de maig del 2017

STRUCTURES


A STRUCTURES is a type of effort that can suport a lot of force. It can be an easy way to move to one place to another, to see a realy good lanscapes, to protect...


There are TWO types of structures:
-NATURAL: is all the structures that had formed without any help and any person had do it, for example the rivers or the spider web, etc.
-MAN-MADE: is all the structures that had formed the people to protect them, to live on it, etc.






There are different types of man made structures, one is the scultures the people so scultures to do an honor to someone or other things..., then there are the ones the people live there. The structures that te people do to protect them are walls that ara between a country to another or the ones that protect them of the rivers












The most amazing structure that I like is the effel tower, because is really tall and had a lot of heavy material and at night is more amazing because the lights of the tower turns on and is beautiful.
And for me is almost the most amaizing structure because apart ofhe heavy material, it had passed a lot of time after be build, and it reasist a lot of people.




A force can be a physical power, or intensitive... for example if someone wants to open a door the person has to do a certain force to open it, but in the case of the structures, tha material used to do it, are doing forceone to each other to mantain the strucure up.


RESEARCH OF INFORMATION:






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