Unit B | Topic 1 | Hazard symbols / Exploring matter

Question 1

What is the definition of a hazard sign with a “!” on it?

Answer 1

Irritant:
The substance may cause minor health effects

Question 2

What is the definition of a hazard sign with a damaged person on it?

Answer 2

Health hazard:
The substance is a cause of serious health effects, such as cancer or organ toxicity

Question 3

What is the definition of a hazard sign with a flame on it?

Answer 3

Flammable:
The substance is flammable, and can ignite when exposed to water or air, or the fumes are flammable

Question 4

What is the definition of a hazard sign with a cylinder on it?

Answer 4

Gas cylinder:
The substance (most likely a gas) is stored under pressure, such as liquid nitrogen

Question 5

What is the definition of a hazard sign with test tubes burning objects on it?

Answer 5

Corrosive:
The substance can cause corrosive damage to metals, skin, or eyes

Question 6

What is the definition of a hazard sign with an exploding object on it?

Answer 6

Explosive:
The substance is explosive and is extremely reactive to heat

Question 7

What is the definition of a hazard sign with a flame over circle on it?

Answer 7

Oxidizer:
The substance causes fires or makes existing fires burn hotter and longer

Question 8

What is the definition of a hazard sign with a skull and crossbones on it?

Answer 8

Toxic:
The substance has an immediate and severe toxic effect

Question 9

What is the definition of a hazard sign with a dead tree and dead fish on it?

Answer 9

Environmental hazards:
The substance may cause damage to aquatic environments

Question 10

What is all matter made of?

Answer 10

Extremely tiny particles

Question 11

True or false:
Particles attract each other

Answer 11

True:
Particles do attract each other

Question 12

What happens to particles when they have higher temperature?

Answer 12

They move faster on average than particles at lower temperatures

Question 13

What are the three states matter could be in?

Answer 13

• Solid
• Liquid
• Gas

Question 14

Definition of:
Solid matter

Answer 14

Matter with a fixed volume and a fixed shape

Question 15

Definition of:
Liquid matter

Answer 15

Matter with a fixed volume but a changing shape

Question 16

Definition of:
Gas matter

Answer 16

Neither volume or shape are fixed

Question 17

Definition of:
Matter

Answer 17

Anything that has mass and takes up space

Question 18

True or false:
Air is matter

Answer 18

True:
Air has mass and takes up space

Question 19

Definition of:
Elements

Answer 19

The purest form of matter which cannot be broken down

Question 20

How many elements are part of the periodic table?

Answer 20

118

Question 21

How is an element represented?

Answer 21

1 or 2 letters specifically represent each element, but only the first letter is capitalized

Question 22

What does an element retain no matter how much of it there is?

Answer 22

Physical and chemical properties retain in elements, no matter how much there is of that element

Question 23

Definition of:
Compound

Answer 23

Pure substances made up of 2 or more elements chemically bonded together

Question 24

What must be taken in or given off to break down or put together compounds?

Answer 24

energy

Question 25

What is required to separate elements in a compound?

Answer 25

A chemical reaction

Question 26

Definition of: Chemical formulas

Answer 26

represents what elements are in a compound and how much of that element

Question 27

What are some examples of compounds?

Answer 27

- Salt - Water - Sugar - Baking soda

Question 28

Definition of: Diatomic elements

Answer 28

Elements that always bond to itself in it's purest form

Question 29

How many diatomic elements are there?

Answer 29

7

Question 30

What are all the diatomic elements?

Answer 30

(I)odine (H)ydrogen (N)itrogen (Br)omine (O)xygen (Cl)[chlorine] (F)luorine

Question 31

What phrase can be used to remember the diatomic elements?

Answer 31

(I) (H)ave (N)o (Br)ight (O)r (Cl)ever (F)riends

Question 32

Definition of: Mixtures

Answer 32

Mixtures are not pure substances, and they are physically combined (not chemically)

Question 33

What are the two forms of mixtures?

Answer 33

Homogeneous and Heterogeneous mixtures

Question 34

Definition of: Homogeneous mixture

Answer 34

A mixture where it's components are evenly mixed and stay evenly mixed (also known as a solution)

Question 35

Definition of: Heterogeneous mixture

Answer 35

A mixture in which the parts of it are not evenly mixed and settle into layers over time (also known as a suspension)

Question 36

How can Compounds be identified?

Answer 36

A compound can be written out as a chemical formula

Question 37

How can homogeneous mixtures be identified?

Answer 37

A homogeneous mixture can be pictured as a mixture where you can't see the separate parts, such as a glass of juice

Question 38

How can heterogeneous mixtures be identified?

Answer 38

A heterogeneous mixture can be pictured as a mixture where you can see the separate parts, such as a salad