Lab Safety/WHMIS
The Scientific Method
Lab Equipment
Random!
Chemistry Trivia
100
What should you always wear to protect your eyes during experiments?
Safety Googles
100
An "if-then" statement based on a question of interest.
A hypothesis
100
What is a test tube rack used for?
holding test tubes
100
What should you always do before starting any lab activity?
Read the instructions and listen to the teacher’s directions
100
Which gas makes up 78% of the air we breathe?
Nitrogen!
200
What should you do if you break glass in the lab?
Tell Mrs Delainey or Mrs I, and DO NOT touch with bare hands. Sweep using glass broom into glass waste container, NOT the garbage.
200
What is the variable that you deliberately change in an experiment?
The independent variable
200
What piece of equipment is used to heat substances?
Bunsen Burner
200
What variable do you measure or observe in an experiment? The experimenter cannot directly control this variable.
The dependent variable.
200
How many elements on the periodic table are named after countries, cities, regions, or continents? (Points awarded to the closest guess).
29
300
What does WHMIS stand for?
Workplace Hazardous Materials Information System
300
Jane notices the colour of the liquid in her test tube turns from yellow to blue upon adding a new chemical. What type of observation is this?
Qualitative
300
Which piece of glassware is best for mixing or holding liquid chemicals, not measuring them?
Beaker or erlenmyer flask
300
What is the name of the method we use to smell chemicals safely? Demonstrate this!
Wafting (students demonstrate this).
300
Why do onions make you cry when you cut into them?
They release sulfer compounds, which react with your tears and turn into a mild acid (yes, they literally burn your eyes!)
400
What does this symbol mean?
Flammable
400
Why are control variables necessary?
Prevents errors in results; helps you determine the effect of only one source (the independent variable).
400
Explain how to properly use a scale to weigh out a dry chemical
Turn it on. Place a weigh boat on the scale. Tare the scale. Scoop out chemical into weigh boat until you reach desired weight. Remove from scale, turn off scale.
400
Name three different types of quantitative measurements you could take.
answers may vary... (mass, temperature, volume, height, etc...)
400
Why does your mouth feel cold when you eat a mint or chew gum with menthol?
Menthol is a special chemical that messes with heat receptors in your mouth, and tricks them into thinking your body is literally being frozen.
Capsaiacin, the spicy pepper chemical, also works like this by tricking your heat receptors into thinking you just ate literal fire!
500
Jennifer is using a chemical that warns on the package that it cannot be used near open flames, as it can cause fires to grow out of control. Which symbol would be shown?
Oxidizer, 
500
List the general steps of the scientific method in order.
Observation → Question → Hypothesis → Experiment → Analysis → Conclusion
(If conclusion does not agree with hypothesis, revise hypothesis and try again).
500
Explain how to properly measure a liquid accurately in a chemistry lab.
Carefully pour the liquid into a graduated cylinder, until close to the mark you need. Then use a dropper to slowly add liquid drop by drop until the bottom of the meniscus reaches the measurement you need.
500
Which WHMIS symbol indicates "kills you later"? What, exactly, does a chemical with this symbol have the potential to do?
Health hazard, will give you cancer later in life, but will not kill you right away like a poison symbol chemical would.
500
Why does metal feel colder than wood, even if they are at the same temperature?
Metal has a low heat capacity, which means that it changes temperature easily, and more easily sucks away heat from your body, making it feel colder.
(Water has a high heat capacity, which means it resists temperature change. This is why it takes a LONG time to boil water but the pot it is in heats up almost right away on the stove).