Air

Question 1

What is the composition of air?

Answer 1

Nitrogen - 78%
Oxygen - 21%
Argon - 0.9% ≈ 1%
Carbon Dioxide - 0.04%
Other - 0.06

Question 2

What is air?

Answer 2

Air is a mixture of many gasses and tiny dust particles.

Question 3

What are the properties of air?

Answer 3

Colorless and Odorless
Can be felt
Made of gases
Applies pressure
Occupies space
Has mass
Expands

Question 4

What does matter mean?

Answer 4

Matter refers to anything that occupies space and has mass.

Question 5

Matter is split into two, _______ and _________.

Answer 5

Mixtures and pure substances

Question 6

Pure substances are divided into…

Answer 6

Elements and compounds.

Question 6

What is an element?

Answer 6

A substance that cannot be broken down into another substance

Question 7

What is a compound?

Answer 7

A pure substance that is made of two or more elements that is chemically bonded or combined
E.g. Water

Question 8

What is a mixture?

Answer 8

A material made up of two or more different substances which are not chemically bonded

Question 9

What is a heterogeneous mixture?

Answer 9

A mixture where the composition is not uniform throughout the mixture.
E.g. Salad, Ice cubes in a drink, smog

Question 10

What is a homogeneous mixture?

Answer 10

A mixture where the composition is uniform throughout the mixture.
E.g. Brass, Coffee, Air