Rust is an iron oxide and formed by the reaction of iron and oxygen in the presence of moisture. So the answer would be C
That specific kind is called gas.
When you put water in a freezing temprature it becomes solid.
When you boil water it becomes gas
To work this out you do 400÷20=20
Answer:
Explanation:
Any system within the Earth system is considered an open system. Because energy flows freely into and out of systems, all systems respond to inputs and, as a result, have outputs.
