This process is called weathering.
The type of weathering that does not alter the chemical composition of the rock is called physical weathering. The acid weathering usually alter the chemical composition of a rock.
These are physical changes.
It is a chemical change because the heat and whatnot alter the chemical makeup.
Coloring causes only a physical change to icing because it does not alter the chemical characteristics of the icing.
Chemical substance that alter perceptions and mood are called Psychoactive Drugs.
It goes through physical change if you alter the components through changing it through gas, solid, Liquid
No breaking glass is not a chemical reaction, which is what i think you mean. Breaking the glass does not alter the chemical makeup or properties of the glass. Instead breaking glass is a physical reaction because it does alter the size of the glass and its appearance
it is a chemical reaction because a new substance is formed when the wood rots
Chemical changes alter the chemical makeup of a substance... physical changes only change the way something looks, it does not modify the chemical properties.
chemical change
Neither. It is a physical activity. See the link below for an explanation of physical and chemical properties.
Mowing the lawn is a physical change. Cutting your hair isn't a chemical change, it's still hair, and it will grow back :) Chemical changes alter the identity of a substance, whereas physical changes do not.