Module #4: Classifying Matter And Its Changes

Question 1

Pure Substance

Answer 1

A substance that contains only one element or compound

Question 2

Mixture

Answer 2

A substance that contains different compounds and/or elements

Question 3

Homogeneous mixture

Answer 3

A mixture with a composition that is always the same no matter what part of the sample you are observing

Question 4

Heterogeneous mixture

Answer 4

A mixture with a composition that is different depending on what part of the sample you are observing

Question 5

Chemical change

Answer 5

A change that affects the type of molecules or atoms in a substance

Question 6

Physical change

Answer 6

A change in which the atoms or molecules in a substance stay the same

Question 7

Phase change

Answer 7

When a substance changes from solid to liquid, or vice-versa

Question 8

Homonuclear Diatomics

Answer 8

Elements in nature that are composed of molecules (specifically, two atoms of the same type) rather than, individual atoms

Question 9

Name the Homonuclear Diatomic elements.

Answer 9

• Nitrogen - N2
• Oxygen - O2
• Chlorine - Cl2
• Fluorine - F2
• Bromine - Br2
• Iodine - I2
• Astatime - At2
• Hydrogen - H2