Air
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What is the composition of air?
Nitrogen - 78% Oxygen - 21% Argon - 0.9% ≈ 1% Carbon Dioxide - 0.04% Other - 0.06
What is air?
Air is a mixture of many gasses and tiny dust particles.
What are the properties of air?
Colorless and Odorless Can be felt Made of gases Applies pressure Occupies space Has mass Expands
What does matter mean?
Matter refers to anything that occupies space and has mass.
Matter is split into two, _______ and _________.
Mixtures and pure substances
Pure substances are divided into…
Elements and compounds.
What is an element?
A substance that cannot be broken down into another substance
What is a compound?
A pure substance that is made of two or more elements that is chemically bonded or combined E.g. Water
What is a mixture?
A material made up of two or more different substances which are not chemically bonded
What is a heterogeneous mixture?
A mixture where the composition is not uniform throughout the mixture. E.g. Salad, Ice cubes in a drink, smog
What is a homogeneous mixture?
A mixture where the composition is uniform throughout the mixture. E.g. Brass, Coffee, Air