Topic 1A: WHMIS and MSDS, Classifying Matter

Question 1

WHMIS

Answer 1

Workplace Hazardous Materials Information System

Question 2

(M)SDS

Answer 2

(Material) Safety Data Sheets

Question 3

Toxic WHMIS Hazards

Answer 3

• acute toxicity (a small amount could kill you, whether through consumption or exposure)

Question 4

Harmful/Irritant WHMIS Hazards

Answer 4

• can cause an allergic reaction after repeated exposure to skin/respiratory system

Question 5

Corrosive WHMIS Hazards

Answer 5

• harsh chemicals can irreversibly damage/destroy living tissue

Question 6

Health Hazards

Answer 6

• chemicals can cause chronic (very serious) health issues such as asthma or even cancer

Question 7

Flammable Hazards

Answer 7

• flammables can ignite easily and burn rapidly

Question 8

Oxidizing Hazards

Answer 8

• a specific type of reactive that vigorously takes electrons from other substances

Question 9

Compressed Gas Hazards

Answer 9

• gases that can spontaneously burn or explode when released into the air (pyrophoric)
• can cause unconsciousness and death due to oxygen deprivation (asphxiant)

Question 10

Explosive Hazards

Answer 10

• things that can go boom
• reactive that causes a sudden release of gas, light, heat and pressure due to shock, pressure, spark, or high temp.

Question 11

Dangerous for the Environment Hazards

Answer 11

• indicates chemicals with acute/chronic aquatic toxicity

Question 12

Pure substances

Answer 12

• a substance that’s only made up of only one type of particle

Question 13

Compounds

Answer 13

• a type of pure substance
• a chemical combo of two or more elements
• can be broken down into elements through heat/electricity

Question 14

Elements

Answer 14

• a type of pure substance
• made up of one atom and cannot be broken down any further physically/chemically

Question 15

Mixtures

Answer 15

• combo of 2+ substances that aren’t chemically bonded

Question 16

Heterogenous (Mechanical mixtures)

Answer 16

• hetero = different
• physical combo of 2+ chemicals that aren’t equally mixed and the different parts can be seen

Question 17

Homogeneous (solutions)

Answer 17

• homo = same
• physical combo of 2+ chemicals mixed evenly and the different parts blend

Question 18

Physical Changes

Answer 18

• changes in state
• reversible
• don’t result in new substances being formed
  ex. freezing/boiling/melting points, malleability, ductility, smell, taste

Question 19

Chemical Changes

Answer 19

• heat is absorbed or produced
• starting material is used up
• true colour change
• material with new properties is formed
• gas bubbles/precipitate forms in a liquid
• irreversible to change back in original form
  ex. reaction with elements/acids, toxicity, combustibility