rons swords are made of iron and so they oxidize (a fancy word for rust), the process entails the metal absorbing oxygen from the air to create a new compound (rust).
Irons swords are made of iron and so they oxidize (a fancy word for rust), the process entails the metal absorbing oxygen from the air to create a new compound (rust).
On the other hand, jewelry would probably be made out of silver or gold and gems. These metals do not rust in the same way iron does. When silver oxidizes over time it form a protective barrier of already oxidized silver on the outside of the piece of metal -- this has a preservation effect. (And by the way, you should almost note that polishing silver actually removes a tiny bit of silver from the outside of the piece, thus removing the oxidized (tarnished) metal.)
Well for one photosynthesis gives out oxygen. This makes all animals able to live. So in that way it helps us and the world around us. Without photosynthesis we also could not eat food. No animals could live and no plants ould live. VERY IMPORTANT!
Because flu viruses evolve so quickly, last year's vaccine may not protect you from this year's viruses. New flu vaccines are released every year to keep up with rapidly adapting flu viruses.
