Matter

Question 1

What are the groups that matter is classified in?

Answer 1

1. Substance (pure substance)

2. Mixture (impure substance)

Question 2

Elements

Answer 2

• Composed of only 1 type of atom

* Elements cannot be broken down by ordinary chemical means

Question 3

Compounds

Answer 3

• 2 or more elements that have been chemically joined together to make a new substance

• Compounds have properties that are entirely different from its original components
• Compounds can only be broken down by chemical means

Question 4

Mixtures (Impure Substances)

Answer 4

• 2 or more pure substances not chemically joined together

• Retain the properties of the original components
• Components may be mixed in any proportion
• Components may be separated by physical means such as filtering, distilling, dissolving etc.

Question 5

Kinetic Theory of Matter

Answer 5

Matter is made up of particles which are in continual random motion

Question 6

What are the states of matter?

Answer 6

1. Solid
2. Liquid
3. Gas

Question 7

Solid

Answer 7

Particles are tightly packed, vibrating about a fixed a position
- Solids have a definite shape and a definite volume

Question 8

Matter

Answer 8

Anything that occupies space and has mass

Question 9

Liquid

Answer 9

Particles of liquids are tightly packed, but are enough apart to slide over one another
- Liquids have an indefinite shape and a definite volume

Question 10

Gas

Answer 10

Particles of gases are very far apart and move freely

- Gases have an indefinite shape and indefinite volume

Question 11

What is the difference between a chemical change and a physical change?

Answer 11

Chemical Change: not getting back what you started with

Physical Change: can get back what you started with

Question 12

What are the 2 types of change matter undergoes?

Answer 12

• Physical change

- Chemical change

Question 13

Physical Change

Answer 13

• Melting
• Freezing
• Boiling
• Cutting
• Crushing
• Dissolving

Question 14

Chemical changes can usually be identified with the following observations:

Answer 14

1. Formation of an insoluble solid
2. Bubbling or New Odor
3. A color change
4. An energy change
   - Endothermic
   - Exothermic

Question 15

Endothermic

Answer 15

Takes in energy (gets cold)

Question 16

Exothermic

Answer 16

Releases energy (gets hot)

Question 17

What physical characteristics can a phase change graph show?

Answer 17

There are points where they are transitioning

Question 18

Phase Changes

Answer 18

• Melting
• Freezing
• Boiling
• Condensation
• Sublimation

Question 19

Melting

Answer 19

Changing from a solid to a liquid

Question 20

Freezing

Answer 20

Changing from a liquid to a solid

Question 21

Boiling

Answer 21

Changing from a liquid to a gas

Question 22

Condensation

Answer 22

Changing from a gas to a liquid or gas directly to a solid

Question 23

Sublimation

Answer 23

Changing from a solid directly to a gas