Science 8, Unit A

What does WHMIS stand for

What does WHMIS stand for

Workplace Hazardous Materials Information System

WHMIS symbols (10)

Fire, oxidizing, explosive, corrosive, compressed gas can, toxic effects, health, less harmful, environmental, biohazard

what does SDS stand for

Safety Data Sheet

What is a slurry + example

A solid and a liquid in which the sold is used to move the solid, ex. hosing doggy doo doo of a driveway

Properties of a fluid (5)

density, viscosity, buoyancy, compressibility, concentration

pure substances

element that consists of only 1 kind of atom

Mixture

consist of two or more pure substances, not chemically bonded

Compounds

two or more elements, chemically bonded

homogenous mixture + solution (cause their the same thing)

components appear as one, particles are evenly distributed

Heterogenous mixture + Mechanical mixture (cause their the same thing)

Different components are visible

Suspension

particles in a mixture are suspended or hanging

Colloid

A mixture so well mixed, it will not seperate

Dissolving

when two or more substances particles are intermixed

solute

what’s being dissolved in a solution

Solvent

What’s doing the dissolving in the solution

Solubility

The max amount of solute that will dissolve in a solvent

soluble

a given solute will dissolve in a given solvent

Insoluble

A given solute will NOT dissolve in a given solvent

Dilute solution

Little amounts of solute in large amounts of solvent

Concentrated solution

large amounts of solute in small amounts of solvent

Saturated solution

where no more solute is able to dissolve in a given solute

Unsaturated solution

more solute is able to be added

How to calculate concentration

C=M/V

The 4 points of the PMM

1.Everything is made of matter

2. Matter is always moving

3. Increasing energy will increase the particles motion and vice versa

4.There is space b/t the particles

how the PMM explains mixing

Different particles go in-between each other

Factors affecting the rate of dissolving

temperature, agitation, surface area

viscosity

the internal friction b/t a substances particles

How does temp affect viscosity?

higher temp=lower viscosity lower temp=higher viscosity

how to calculate flow rate

r=d/t

Density

the amount of matter in a given volume

How does temp affect density

higher temp=lower density lower temp=higher viscosity

Volume

The amount of space an object occupies

Floating

a less dense substance on top of a more dense substance

sinking

A more dense substance on a less dense substance

Calculating density

d= M/V

buoyancy

the tendency for an object to float

Buoyant force

the force of liquid going against the force of gravity

Plimsol line

a line on the bow or stern of boats that determines how much cargo can be safely loaded depending on the waters temperature and concentration

Pressure

the amount of force distributed over an area

Calculating Pressure

P=F/A

Pascals law

In an enclosed system, pressure is transmitted equally in all directions

Hydraulic

in a system, the enclosed fluid is a liquid

Pneumatic

in a system, the enclosed fluid is a gas

Hydrophobic

water-hating

Hydrophilic

water-loving

detergent components

surfactant, suspension agent, filler

How detergent works

Agitation breaks dirt of clothes, surfactant surrounds dirt to prevent re-attaching

What ballast tanks are used for in submarines

to dive, float, and re-surface

Valves

control the rate of pressure, volume, and flow

pump

forces fluids to go against the force of gravity

what does SCUBA stand for

Self Contained Underwater Breathing Apparatus

Pipeline pig

looks like a bullet, has ridges, moves through pipelines to keep them clear

Where and why is WHMIS used

workplaces, to inform workers about potentially harmful products they may be exposed to

Into what groups can all matter be divided into?

Pure substances and Mixtures

What is another word for a solution

Homogenous mixture

How does temp affect solubility

a higher temp can increase solubility

what controls the rate of flow

temperature

What is called when nitrogen gas is trapped in a diver's blood?

decompression sickness- “the bends”