mixtures Flashcards
1
Q
WHAT IS A PURE SUBSTANCE?
A
Pure substances are made of one type of particle. They cannot be physically separated
2
Q
WHAT IS A MIXTURE?
A
Different types of particles that can be physically separated.
3
Q
COMPOSITION OF AIR
A
Air is made of oxygen, nitrogen and carbon dioxide plus some extra gases. We use oxygen in respiration. Condensation can be used to separate the gases in air