Practical Exam Review Flashcards
The LABO practical review
what does WHMIS stand for?
Workplace Hazardous Materials Information System
what does HHPS stand for?
Hazardous Household Products Symbols
what are the 10 WHMIS symbols?
- Compressed gas (bottle)
- Flammable material (flame)
- Oxidizing (circle with a flame on top)
- Explosive Hazard (explosion)
- Harmful or Fatal (skull and crossbones)
- Biohazardous/Infections (circle shaped)
- Corrosive (pouring material on burning hand)
- Health Hazard (human with ‘explosion’ in chest)
- Harmful (exclamation mark)
- Harmful to the environment (dead tree and fish)
a triangular shaped HHPS symbol means what?
the container is dangerous
an octagonal shaped HHPS symbol means what?
the product inside the container is dangerous
what are the HHPS symbols?
- explosive (triagnle, explosion)
- corrosive (octagonal, hand bones)
- poisonous (octagonal, skull and crossbones)
- flammable (octagonal, flame)
what are the WHMIS signal words?
- danger (for severe hazard)
- warning (for less severe hazard)
what is used to hold a hot beaker?
beaker tongs
what is used to measure the mass of a substance?
electronic balance
what is used to view small specimen?
microscope
what is used to measure temperature?
thermometer
what is used to measure volume?
graduated cylinder
what is used to heat substances?
hot plate
what is used to obtain a small amount of a liquid?
eye dropper
what is used to hold a test tube when it’s hot?
test tube holder
what is used to conduct tests on small amounts of a substance?
spot plate
what is used to hold a funnel, beaker, Erlenmeyer flask, etc.?
retort stand
what is used to grind a solid into smaller pieces?
mortar and pestle
what is used to hold small amounts of a liquid?
test tube
what are the different types of elements?
- atomic element
- molecular element
what are the different types of compounds?
- molecular compound
- ionic compound
what is an atomic element?
only one atom makes up substance (ex. Au, Ag, Na)
what is a molecular element?
only one type of atom make up the substance (ex. O2, H2, N2)
what is a molecular compound?
2 or more non-metallic elements make up the substance (ex. H2O, CH4)
what is an ionic compound?
a metallic atom and one or more non-metallic atoms are chemically combined (ex. NaCl, CaCO3)
what is a physical property?
a property that can be determined using our five senses
what is a chemical property?
involves the formation of one or more new substances
how do you know if it is a chemical property?
- Formation of solid
- Formation of gas
- Formation of energy
- Drastic colour change
- irreversible reaction
how can you use the electrostatic series to determine the charge on an object after friction?
the object higher on the list loses electrons and becomes positively charged, while the lower substance gains electrons and becomes negatively charged
higher = positive charge
lower = negative charge
what are the three laws of electric charges?
- like charges repel
- opposite charges attract
- neutral objects neither repel nor attract
what’s the difference between a parallel and series circuit?
parallel has multiple paths for electrons to flow, series only has one path
how do you measure current?
black wire in com, red wire in A, connect in series
how do you measure voltage?
black wire in com, red wire in Y, connect in parallel
what is a predator?
an organism that kills and eats another organism
what is prey?
an organism that is killed and eaten by the predator
define the term biotic factor
living components, (ex. plants, animals)
define the term abiotic factor
non-living components, (ex. temperature, wind)
list some biotic factors that can impact the growth of plants
- overcrowding of plants
-
list some abiotic factors that can impact the growth of plants
- not enough water
- not enough sunlight
- natural or caused disaster
what is the difference between rotation and revolution?
rotation: earth makes one rotation from the west to east a day
revolution: earth revolves around the sun one time every 365.25 days
what is the difference between solar and lunar eclipse?
solar: occurs when the moon is aligned with the earn and sun and blocks the sun
lunar: occurs when the earth is positioned between the sun and moon casting a shadow on the mood
how can you differentiate between summer solstice and winter solstice in a model of the solar system in the southern and northern hemisphere?
winter: northern hemisphere is tilted away from the sun as much as possible (december 21st)
summer: northern hemisphere is tilted toward the sun as much as possible (june 21st)
How do you tell if something is transparent?
You can see right through it (its clear)
How do you tell if something is translucent?
You can partially see through it, its not completely see through (mouth wash)
How do you tell if something is opaque?
You cannot see through it at all (Ketchup)
How do you find out if something is denser than another object?
Put the object in water and see if it floats, or see what sinks faster. (The object that sinks faster is denser)
How do you find out if something is more viscous than another object?
Let the two substances drip, the one that drips slower is more viscous
How do you find out which is more malleable?
Try bending it
Which one has more lustre?
How shiny is it?
Which one is more water-soluble?
Mix it with water?
What is temporary induction?
When a charged object is brought close to a neutral object, the electrons move to one side temporarily (Water bending)
What us permanent induction?
When a charged object is brought close to a neutral object, the electrons move to one side while you are grounding the neutral object. When you remove the charged object and the ground it will be permanently charged
