Why metals get corrode and why not materials like wood,plastic etc. do not get corroded

Thanks Anand  for helping  out with a good question.Thanks for the support given to us.

Basically corrosion means wearing away of metal in other words Corrosion is the gradual destruction of materials (usually metals) by chemical reaction with their environment.

Metals get corroded because they come from ores and the ores mainly comprises of oxides,flourides or other highly electronegitive elements bound with metal atom.Since metals are positive in charge they combine with them and form stable compounds.

~~>Where as wood is already stable with its carbon and Hydrogen materials and also some oxygen. So,it does not need to corrode.

~~>Metals are formed by reducing  these stable compounds to metals.And as Oxygen in the Atmosphere is electronegitive. It has high affinity towards the metals and combines with them wear away as powder,this is called corrosion

eg: Fe₂O₃ (Hematite) , Fe₃O₄ (Magnetite) are ores of Iron we need to reduce them to form Iron,And Iron has High Affinity towards Oxygen and Fe₂O₃  and FeO,This is called rust.Preventive measures can be taken


And please give us good question which we can answer through this https://docs.google.com/forms/d/1BbC0ZgyPDt7X3u8R1tKowfszsI1Cz5VUdAd2d5U7PBs/viewform?usp=send_form

MAVEN

One of the Blog Viewer Ashwin, Asked me a question about MAVEN. Thank you Ashwin for giving us the First Question.
MAVEN is an unarmed Space Craft, Which was designed to know Mars's atmosphere with a curiosity of knowing about other Planet. MAVEN is a abbreviation of Mars Atmosphere and Volatile Evolution. By it's name,  We can conclude that  MAVEN was sent to know the atmosphere of Mars and to know about the presence of  water  present at Mars.

MAVEN is operated by NASA. It was launched on 18th November 2013, And it got placed  in an Orbit 150 km away from Mars to acquire the information.

Now your question comes Ashwin :Why was only Mars thought to have life?
Due to following reasons :
--->Nearest  Planet to Earth (Can approximately have the same environmental conditions as Earth).
--->It is expected that small Bacteria may be present on Mars.

 Recently, India has also sent an Aircraft to Mars named 'MOM'.( MangalyanMars Orbiter Mission)

For more information, Visit : http://www.nasa.gov/mission_pages/maven/main/

And please give us good question which we can answer through this https://docs.google.com/forms/d/1BbC0ZgyPDt7X3u8R1tKowfszsI1Cz5VUdAd2d5U7PBs/viewform?usp=send_form