to classified weather it is a chemical or physical change :))
The most important are changes of phase: melting, boiling, freezing.
I really dont know lol
Matter undergoes changes due to interactions between its particles, such as collisions, chemical reactions, or changes in temperature, pressure, or energy levels. These interactions can cause rearrangement of the particles or changes in their properties, leading to physical or chemical changes in the matter.
Not unless there's something about the matter that you really need to know. Examples: -- If you need to know whether the matter will fit through the door, then it's important to measure its width and height. -- If you need to know whether the matter is safe to eat yet, then it's important to measure its internal temperature. -- If you're buying some of the matter and you need to know what it should cost, then it's important for somebody ... either the buyer or the seller ... to measure its length, weight, area, or volume.
Chemistry
The study of properties of matter and how it changes is called chemistry.
Chemistry - the study of the properties of matter and how matter changes
He likes you that is what is important. it doesn't matter who else knows you.
laws and principle governing changes of matter
Matter changes state because of pressure and temperature.
chemistry
how temperature can bring about changes in the state of matter