I suppose that you think to a reactant.
A mixture is a substance that has more than one component stirred together but does not undergo a chemical reaction. The components of a mixture can be physically separated from each other.
Scientists call burning a chemical reaction in which a substance combines rapidly with oxygen to produce heat and light, resulting in combustion.
A "reagent" or "reactant".
The substance that reacts chemically with another to produce heat is called a "reactant."
a physical change will only alter the appearance but will NOT change the substance to another substance =)
When a substance changes from one state of matter to another it is called changing its state. Temperature changes are usually the main cause of this change.
Fellowships
Conjoined (or Siamese) twins.
This statement might be a good definition of a chemical compound.
its an insoluble substance
In a solution, the substance that is being dissolved is called the solute. The solute is typically present in a smaller amount compared to the solvent, which is the substance that dissolves the solute. Together, the solute and solvent form a homogeneous mixture.
This substance is called a solute.