Unit B | Topic 2 | Changes in matter and Properties of matter

Question 1

Definition of:
Physical properties

Answer 1

Used to describe a substance
(physical appearance)

Question 2

Definition of:
Chemical properties

Answer 2

Properties that can only be observed when the chemical composition of a substance is changed (and a new substance if formed)

Question 3

Examples of physical properties
(You don’t have to name all of them)

Answer 3

• Mass
• Volume
• Color
• Luster
• Shape and Size
• Hardness
• Melting and boiling point
• Viscosity
• Density

Question 4

Definition of:
Mass

Answer 4

The amount of matter in an object

Question 5

Definition of:
Volume

Answer 5

The amount of space that an object takes up

Question 6

Definition of:
Color

Answer 6

Visual quality determined by hue, saturation, and brightness or reflected light

Question 7

Definition of:
Luster

Answer 7

How reflective a surface is

Question 8

Definition of:
Shape and size
(p.s not really an actual question)

Answer 8

If you don’t know what shape and size is, may I suggest that you seek immediate mental health assistance

Question 9

Definition of:
Melting point

Answer 9

The temperature at which a solid turns into a liquid

Question 10

Definition of:
Boiling point

Answer 10

The temperature at which a liquid turns into a gas

Question 11

True or false:
Melting or boiling points are state changes

Answer 11

True

Question 12

Definition of:
Hardness

Answer 12

A materials ability to resist breaking

Question 13

Definition of:
Viscosity

Answer 13

A liquids resistance to flow
(how easily it flows)

Question 14

Definition of:
Solubility

Answer 14

A substances ability to be dissolved in a solvent to make a solution

Question 15

Definition of:
Density

Answer 15

The amount of mass that is in a given volume

Question 16

Definition of:
Qualitative property

Answer 16

A characteristic of a substance that can be described
(quality)

Question 17

Definition of:
Quantitative property

Answer 17

A characteristic of a substance that can be measured numerically
(quantity)

Question 18

Examples of:
chemical properties
(you don’t have to name them all)

Answer 18

• Combustibility
• Flammability
• Reactivity
• Toxicity
• Radioactivity
• Oxidation

Question 19

Definition of:
Combustibility

Answer 19

A measurement of how easily a substance catches on fire

Question 20

Definition of:
Flammability

Answer 20

The ability of a chemical to burn or ignite

Question 21

Definition of:
Reactivity

Answer 21

a measurement of how likely a substance is to undergo a chemical reaction

Question 22

Definition of:
Toxicity

Answer 22

The ability of a substance to cause harm to an organism

Question 23

Definition of:
Radioactivity

Answer 23

The ability for a substance to release energy from an unstable atom

Question 24

Definition of:
Oxidation

Answer 24

A substances ability to lose electrons

Question 25

Definition of:
Physical change

Answer 25

A substance changes FORM (NOT a chemical composition)

Question 26

Definition of:
Chemical changes

Answer 26

Causes one or more new substances to be formed (possibly irriversable)

Question 27

How can a physical change be identified?
(remember the 4 “S”)

Answer 27

> The substance stays the same chemically, but changes its physical form:
- Change of (S)hape
- Change of (S)tate
- Change of (S)ize
- Becomes a mixture or (S)olution

Question 28

How can a chemical change be identified?
(remember “CTGPO”)
(Or try “chat GPT. CO”)

Answer 28

> The substance changes chemically:
- (C)olor change
- (T)emperature change
- (G)as
- bubbling or fizzing
- (P)recipitation
- Solid that forms in a liquid
- (O)dor