The absence of matter is vacuum. Some examples that are not matter include: light, heat, sound, energy, gravity, time, love and happiness.
Energy, such as light and heat
a mixture
Pure substances are divided into elements and compounds.
conductor,semiconductor and insulator
mutagens
An element cannot be separated into simpler substances by chemical means.
cannot be broken down into other substances
a mixture
platinum
Matter is classified as "mixtures" and "pure substances".
Pure substances are divided into elements and compounds.
flammable substances
yes
They can be classified by 3 types. Reflection, refraction, and i forgot the last
Hydrogen
They're classified according to their pH level.
flammable
The are the natural substances.