Solid
Yes, true steam (you cannot see it) is matter in the gas form.
Anti- Matter
Yes, matter can be something that you can not see. This is because one form of matter is gas, which can not be seen.
An atom A fundamental particle
The abstract noun form of the verb to 'classify' is classification.
The law of conservation of matter is the law that says that matter cannot be created or destroyed, but can only change form
Aristotle is often credited with the concept that form and matter are inseparable in his philosophy of hylomorphism. The idea is that form and matter are two essential components that make up physical objects, with form providing the structure and organization, and matter providing the substance. Thus, according to Aristotle, form and matter are interdependent and cannot exist without one another.
23/20 is in its simplest form: it cannot be simplified.
None, energy cannot be made or destroyed. It can only change form. The energy you would get from any organic matter is already in the matter. The energy is not being "made". It is just changing form. All matter is just energy.
The principle that matter cannot be created or destroyed, only transformed from one form to another, is known as the Law of Conservation of Mass. This fundamental principle is a cornerstone of the field of chemistry and is supported by numerous scientific observations and experiments.
The law of conservation of matter and energy states that matter and energy cannot be created or destroyed, only changed in form. This principle is fundamental to understanding the interactions and transformations of matter and energy in the universe.
Antoine Laurent Lavioser