Grade 12 Lab Practical Worksheet
This worksheet assesses understanding of laboratory safety, equipment, experimental design, and data analysis for Grade 12 science students.
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Grade 12 Lab Practical Worksheet
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Read each question carefully and answer to the best of your ability. Show all work where applicable.
1. What is the primary purpose of wearing safety goggles in the lab?
To look fashionable.
To prevent chemical splashes from entering the eyes.
To improve visibility of small objects.
To protect against loud noises.
2. What should be done immediately if a chemical spill occurs on your skin?
Wipe it off with a paper towel.
Apply a neutralizing agent.
Rinse the affected area with plenty of water for at least 15 minutes.
Ignore it if there's no immediate pain.
3. A is used for precisely measuring the volume of liquids.
4. When heating a substance in a test tube, always point the opening of the test tube .
5. Explain the difference between an independent variable and a dependent variable in an experiment.
6. Why is it important to have a control group in an experiment?
7. A pie chart is always the best way to represent data showing trends over time.
True
False
8. The mean, median, and mode are all measures of central tendency.
True
False
Match each lab term with its correct definition.
9. Hypothesis
a. A factor that is kept constant in an experiment.
10. Variable
b. A testable prediction for an observation.
11. Control
c. Any factor that can change in an experiment.
12. Observe the image below of a laboratory. Identify two pieces of safety equipment and two pieces of experimental equipment you can see.
Safety Equipment:
Experimental Equipment: