Lab Safety
Lab Equipment
Scientific Investigation
Scientific Skills
100
What are two rules in the lab that ensure our safety?
Any two of these
Always follow the teacher’s instructions.
Wear enclosed waterproof shoes in the lab.
Wear safety glasses when in the practical area.
Only walk around in the lab/No running in the lab.
Always tie hair back during practical activities.
No eating or drinking in the lab.
Report all spills, breakages and injuries to your teacher as soon as they occur.
Only use equipment as instructed.
100
Name this piece of equipment
Beaker
100
Make an observation AND an inference. 
E.g. Observations:
- There are two bears
- The bears have brown fur
E.g. Inferences:
- The bears are siblings
- The bears are fighting
100
What unit is used to measure mass in the lab?
Grams (g) or kilograms (kg)
200
Why is it important to wear safety goggles during experiments?
To protect your eyes from harmful chemicals, heat, or flying debris.
200
Draw a scientific diagram of a measuring cylinder
200
Identify the independent and dependent variables in this experiment:
"How does temperature affect the time it takes for ice to melt?"
Independent variable: Temperature
Dependent variable: Time taken for the ice to melt
200
How do you measure the volume of a liquid using a measuring cylinder?
Read the volume at the BOTTOM of the meniscus - read at eye level.
300
Why you should never eat or drink in the science lab?
Food and drinks can become contaminated with chemicals, and eating in the lab increases the risk of ingesting harmful substances.
300
What is a Bunsen burner used for, and what are its two types of flames used for?
A Bunsen burner is used for heating substances in the lab.
Two flames:
Safety flame (yellow) - as a light source and as default setting because it is safer
Heating flame (blue) - to heat things
300
What does it mean for an experiment to be a fair test?
A fair test is when only one variable is changed while all other factors are kept the same.
300
A rock has a mass of 150 g and a volume of 50 cm³.
What is its density? Show working.
Density = Mass ÷ Volume
Density = 150 g ÷ 50 cm³ = 3 g/cm³
400
A student is splashed with a chemical in their eyes. What steps should they take immediately?
Rinse eyes out over eye bath for at least 15 minutes
Inform the teacher immediately.
Follow any further first aid instructions.
400
What are the steps to lighting a Bunsen burner, you need to change it to a blue flame as well.
1. Make sure hose is firmly plugged into gas tap.
2. Make sure air hole is closed.
3. Light the lighter and hold close to top of Bunsen then turn open gas valve.
4. Carefully twist air hole to open to change to heating flame (blue flame).
400
A student is investigating which surfaces affect how far a toy car rolls.
Name two controlled variables (things you need to keep the same).
Any two of these
The type of toy car
The height of the ramp
Way of measuring distance
Where the car is released from
How the car is released - pushed/not pushed
400
How would you measure the volume of an irregular-shaped object like a rock?
Fill a measuring cylinder with water and record the initial volume.
Submerge the rock in the water and record the new volume.
The difference between the two readings is the rock’s volume.
500
What does the emergency stop button control? When would you need to use the emergency stop button in the lab?
It controls the gas and electricity.
It should be used in an emergency, such as:
A gas fire, or if a Bunsen burner won’t turn off.
An electrical fault or fire caused by electrical equipment.
500
A student needs to heat 50 mL of water safely to 90 degrees. List all the equipment they should use and explain why.
Bunsen burner (for heating)
Tripod and gauze mat (to support the container and spread heat evenly)
Beaker (to hold the water)
Measuring cylinder (to measure 50mL accurately)
Thermometer (measuring temperature)
Tongs (to handle hot equipment)
500
A student plans an experiment involving heating a liquid with a Bunsen burner.
Identify one hazard, the risk it poses, and one precaution to reduce the risk.
Hazard: Open flame from Bunsen burner
Risk: Burns or fire if clothing or equipment catches alight
Precaution: Tie back hair, keep flammable materials away, use heatproof mats
500
A student estimated the density of a metal cube was 10.0 g/cm³. They calculate the density as 9.5 g/cm³.
Calculate the percentage error. Show working
% Error = (Estimate Value - Actual Value) ÷ Actual Value × 100
% Error = (10.0 - 9.5) ÷ 10.0 × 100
% Error = 5%