Ib science test 1

WHImis:

government program to ensure workplace safety provides info on health and safety fpr hassardous materials. WHIMIS stands for Workplace, Hazardous, Materials, INformation System

Grass method equations

Given: List all of the values that are given. Remember to include units.Required: Identify the value that the question is asking you to find.Analysis: Write down a mathematical equation in this step.Solution: Substitute the given values into the equation and calculate the required value. Include units and round your answer to an appropriate number of digits.Statement: Write a sentence that answers the question you identified in the “Required

whimis safety lables

show info on hassards for the material

WHIMIS label must have

: Name, Maker, statement that MSDS is available, hazard classification symbles, risk phrases (words to discribe main hazards).

GHS label:

quick visual identifiers for hazards, procautionary and first aid measurs.

GHS label:

quick visual identifiers for hazards, procautionary and first aid measurs.

bunsen burn

bunsen burner, gas powered unensil (It pumps out gas) for heating substances consisting od gas inlet, burder tube, air coontrol vent and gas control.

safety goggles:

used to protect eyes in an experament

evaporating dish:

dish used to evaporate liquids from a solid

test tube rack

: used for holding and organizing test tubes on the lab counter

graduaed cylender:

: used to acuratly measure liquid volumes

thermomitre:

used to measure temperature

glass stiring rod:

used to mannually stir sollutions or transfer a singe drop of a solution

spot plate: e

used to perform many small scale reactions at once

wire gauze:

used to help dispence solid chemicals from containers

State

The different phases that matter can take

on: TSolid (s), liquid (l), gas (g

Odour

: The property of a substance that gives it a characteristic scent or smell

Colour.

The appearance of objects described in terms of a person’s perception of their hue, lightness, and saturation, which depends on wavelengths

Odour

The property of a substance that gives it characteristic scent or smell.

taste

The sensation that results on the taste buds of the tongue. There are four tastes: sweet, like sugar; sour, like vinegar;salty, like table salt; bitter, like coffee.

Clarity:

The transmission of light through a substance . Transparent (clear) Translucent (cloudy) Opaque (light does not pass through)

Lustre:

The ability of an object to reflect light. Chrome has a high lustre; flat paint has a low lustre

Form

Substance’s shape or structure. Crystalline: salt (cubic shape) Amorphous: starch (irregular shape)/ Powdery

Texture:

The feel of a substance.

Hardness:

The resistance to being scratched and is rated on a scale from 1 to 10

Brittleness:

The ability of an object to break apart or shatter easily. these cannot bend

Malleable:

The ability of a substance (metals) to behammered (into a sheet/shape) without being compromised

Ductility:

ability of a substance (metals) to bestretched out into a long, wire-like shape

Viscosity

The resistance of a liquid to flowing

Conductivity:

The ability of a substance to conduct an electric current Conductors: copper, aluminum, gold Non-conductors: plastics, wood

qualitative properties:

properties that can be described without numbers

quantitative properties:

measured properties with an amout and unit.

variable

condition that changes or varies the outcome of inquiry

indipendant variable:

variable change(ed)

Variable:

any condition that (can) changes or varies the outcome of a scientific inquiry. Examples: colour, size, speed, melting point, etc

controle variable:

veriable that says the same

independant variable (graphing)

variable controlled by experimentre on x axis

dependant variable (graphing)

: veriable affected by independant variables on y axis

()^0

any number^0 is 1

move decimal until there is one non 0 number intil left of decimal

equation for scientific not

“c” x 10^ “n“ (c=coefficient)

converting units

to convert to higher, multiply. for lower, divide.

segnificant and non segnificant numbers

All nonzero digits are significant, Zeros between nonzero digits are significant, Zeros to the left of the first nonzero digit in a number are not significant. When a number ends in zeros that are not to the right of a decimal point, the zeros are not significant, but if to right they are

rule 1 For rounding to an amount of segnificant numbers

When the first digit discarded is less than 5, the last digit kept (i.e, the one before the discarded digit) stays the same

rule 2 For rounding to an amount of segnificant numbers

When the first digit discarded is greater than 5, or when it is 5 (followed by at least one digit other than zero), the last digit kept increases by one unit.

rule 3 For rounding to an amount of segnificant numbers

When the first digit discarded is 5 followed by only zeroes, the last digit kept is increased by one unit if it is odd but not changed if it is even.. you only care about rule if last digit kept is even.

rounding segnificant digits rule 5

when multipling or dividing ypur answer must be roundedhave no more segnificant digits the the quantity with the fewest. If quantities are in scientific notation use coefficients

rounding segnificant digits rule 4

when adding or subtracting, measured quantities(like kg)you must round your answer to that amount of digits after decimal point. If quantities are in scientific notation use coefficients