Lab Safety
What does WHMIS stand for?
Workplace Hazardous Materials Information System
What is matter?
Anything that has mass and takes up space
Is oxygen an element, compound, or mixture?
Element
What does the pH scale measure?
How acidic or basic a solution is
What is the smallest unit of matter?
The Atom
What does HHPS stand for?
Hazardous Household Product Symbols
Compare the shape and volume of solids and liquids
Solids = Fixed shape and volume
Liquids = Fixed volume and takes shape of container
What is the difference between a homogeneous and heterogeneous mixture?
Homogeneous: Looks the same throughout
Heterogeneous: Visibly different parts
What number on the pH scale represents neutral?
7
What information does each element's square on the periodic table show? (name at least 2)
Element name
Symbol
Atomic number
Atomic mass
State
What is the difference between Caution, Warning and Danger on HHPS labels and what are their symbols?
Warning - Moderate risk (Diamond)
Danger - Highest risk (Octagon)
State two physical properties and two chemical properties of matter
Physical : colour, density, conductivity
Chemical: Flammability, reactivity
What is the difference between a compound and an element? (Give an example of each)
Element = one type of atom (Oxygen)
Compound = atoms bonded (Water)
What color does blue litmus paper turn in an acid?
Red
What's the difference between metals and non-metals? (Name at least 2 differences)
Metals are: Shiny, Conductive, Malleable
Non - Metals are: Dull, Brittle, Poor conductors
Name two pieces of safety equipment in a science lab and explain their purpose
Googles - protect eyes
Fire extinguisher - put out fires
Eye wash station - rinse chemicals
Why are flammability and reactivity considered chemical properties instead of physical?
They describe how a substance changes into something new, not it's physical appearance
Classify the following as either an element, compound, homogeneous, or heterogeneous
Table salt:
Salad:
Apple juice:
Salad: Heterogeneous mixture
Apple juice: Homogeneous mixture
Classify the following as either an acid or a base?
Lemon Juice
Soap
Vinegar
Lemon Juice = Acid
Soap = Base
Vinegar = Acid
Who created the first periodic table and how was it organized?
Explain why WHMIS is a law in Canada and give an example of how it keeps workers safe?
It protects workers by providing safety information about hazardous products (preventing chemical accidents at work)
Explain the particle Theory of Matter
1. All matter is made of tiny particles
2. Particles are always moving
3. Spaces exist between particles
4. Adding heat makes particles move faster
5. Particles attract each other
Explain the difference between a
Solution
Suspension
colloid
Solution = evenly mixed
Suspension = mixture settles out
Colloid = cloudy but doesn't settle
Explain why acids and bases are important in everyday life. Give an example for an acid and a base.
Acids: Used in food (Vinegar, lemon juice)
Bases: Used in Soap, Baking soda, Antacids
Explain why the periodic table is useful for scientists today?
Helps predict properties
See patterns
Organize element information