physical and chemical properties and physical and chemical changes. what is Ability to corrode (similar to rusting) when exposed to moist air

It kind of like mold for different materials

Iron-Mold

Drinks-Fog/rotton water particles

Food/ Rotton or raw Ingredients

Dirt-Waste

Paint- Becoming solid or a different color

narendra modi is currently the pm of india

explanation:

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.