Lab Safety🥽
Name three safety features you would find in a science lab.
eyewash station, fire extinguisher, fire blanket, first aid kit, goggles, emergency shower etc.
What does WHMIS and HHPS stand for?
Workplace Hazardous Materials Information System.
Hazardous Household Product Symbols.
What piece of lab equipment is best for measuring the volume of a liquid?
Graduated cylinder
What are the six main steps of the scientific method?
Question, Hypothesis, Experiment, Observations, Analysis, Conclusion
What should you do first if an accident happens in the lab?
Tell the teacher immediately. Do not try to fix it on your own.
What does the corrosive symbol tell you?
The substance can burn skin and eyes and damage materials.
What tool is used to measure temperature, and what does temperature actually measure?
A thermometer. Temperature is a measure of the thermal (heat) energy of the particles of a substance.
What is the independent variable?
The factor you change
What does “lab safety” mean, and why is it important?
Lab safety means following rules and using equipment properly to avoid accidents. It’s important because it protects you and others from injuries, burns, and chemical exposure.
Where would you usually see HHPS symbols?
On household products like cleaners, hairspray, and garden chemicals.
What is the curved surface of a liquid in a graduated cylinder called?
The meniscus
What is the difference between qualitative and quantitative observations?
Qualitative: descriptions using senses (colour, smell, texture)
Quantitative: numbers and measurements (cm, °C, time, mass)
Why is eating or drinking not allowed in the lab?
Food and drinks can get contaminated with chemicals, which can make you seriously sick.
Explain the HHPS borders: Caution, Warning, Danger.
octagon: danger
diamond: warning
triangle: caution
Which is more accurate for measuring 18 mL: a beaker or a graduated cylinder? Why?
Graduated cylinder, because it has more markings and is more precise.
Why must a good procedure be detailed and easy to follow?
So the experiment can be repeated and results are reliable.
State one lab safety rule and explain what could happen if it’s ignored.
One lab safety rule is to always wear safety goggles. If this rule is ignored, chemicals or broken glass could splash or fly into your eyes, causing serious injuries such as burns, eye damage, or even blindness. (answers may vary)
What is the symbol for serious health effects?
A diamond with an ! in the middle.
A student measures liquid from the top of the meniscus. What kind of mistake is this and how will it affect the result?
It’s a reading error. The volume will be incorrect (usually too high).
Why is the statement “Plants grow taller with fertilizer” a good hypothesis but not a conclusion?
Because it is a prediction and has not been tested yet. A conclusion is written after an experiment and results.