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Basically everything and anything that is matter is composed of atoms. This would mean that literally, everything, in a classroom is made of atoms.
Everything is made out of matter so everything in your classroom is matter.
There may be a Helium atom or two and some diatomic atoms, but just about anything in the classroom is made of molecules.
All things (objects) that exist are made out of matter.
Yes. All things with mass are made of matter.
All are made from matter.
The moon is made of matter and all things made of matter have gravity.
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Matter.
Energy (such as light) and space (which may contain matter, but is not made out of it).
Everything has matter. Matter is what things are made up off. Even air has it.
Matter, Atoms