Wednesday, 9 November 2016


Fast Rust Task

Walt: synthesise information from multiple sources.

Work on this Doc together with a partner.

What 3 ingredients are needed for rust to occur.
Oxygen from the air (O)
Water (H2O)

Write a brief paragraph explaining the rusting process (why rusting occurs)
When some metals are exposed with water and oxygen, it forms rust. Rust is a type of corrosion. Rusting occurs when H2O (water) and O (oxygen) is in contact with iron or steel. The rusting process becomes faster when salty water or acid rain is applied.  
How could you prevent something from rusting?
By preventing metal from rusting you can paint it or put a layer of oil or grease over the metal. It is a good idea to use this as a solution so that the oxygen could bounce off the metal instead of rusting it, depending on what kind of environment  the metal is in.

Write 3 sentences explaining something new you’ve learned from this reading.
We learnt that the term corrosion is used to describe metal breaking down when it is exposed to the environment. We also learnt that rusting can be prevented when you either paint, grease/oil or a process called galvanizing. An example of galvanizing is when you put zinc and iron together, the zinc protects the iron but it sacrifices itself because zinc reacts more than the iron.

In this task I learnt about rust and how metal can corrode. Rust is a type of corrosion, corrosion happens to metals when they are exposed with water and air for a long time. Rust slowly breaks down metals into other chemicals. Another name for rust is hydrated iron oxide. 

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