* Air is matter: We can't touch or pick up air directly, but it's definitely matter. It has mass and takes up space.
* Light is not matter: Light can be seen and felt (as heat), but it's not matter. It's made up of photons, which are energy packets, not particles with mass.
* Some matter is hard to pick up: Think of gases like helium. It's matter, but you can't just grab a handful of it.
A better definition of matter:
Matter is anything that has mass and takes up space (volume).
This definition encompasses everything from the air we breathe to the stars in the sky.
