Grade 7 Integrated Science · Strand 1: Scientific Investigation · Introduction to Integrated Science
Laboratory Hazards and Safety Symbols
A short Grade 7 Integrated Science lesson for the CBE curriculum, part of Scientific Investigation: Introduction to Integrated Science. Learn it on any phone with notes and slides, then check yourself with a quick quiz and earn XP. This lesson is free.
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5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.
1. Why must a learner never taste an unknown clear liquid found on a laboratory bench?
- A. The glassware is too narrow to taste from safely
- B. It could be toxic, corrosive or harmful even in tiny amounts
- C. Tasting changes the temperature of the liquid
- D. Tasting makes the liquid evaporate too quickly
2. A bottle of hydrochloric acid carries the corrosive hazard symbol. Which precaution is correct?
- A. Keep it near a Bunsen burner so it stays warm
- B. Wear safety goggles and rinse any splash with cold running water
- C. Smell it carefully to check its strength
- D. Store it next to flammable solvents
3. Which hazard symbol would you expect on a bottle of ethanol, which catches fire very easily near a flame?
- A. Flammable
- B. Oxidising
- C. Radioactive
- D. Corrosive
4. What one-word term describes a substance that attacks, burns or destroys living tissue and materials such as metal?
Type your answer in the lesson.
5. A learner splashes a chemical in her eye in the laboratory. After alerting the teacher, she must rinse the eye with cool running water for at least how many minutes?
Type your answer (in minutes) in the lesson.
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