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Understanding Laboratory Safety and Scientific Principles in Chemistry

This guide outlines essential laboratory safety practices and fundamental scientific concepts relevant to chemistry experiments. Key topics include the correct actions to take in case of accidents, the protective gear necessary for handling hazardous materials, and methods of conducting observations and experiments. It explains critical terms such as hypothesis, independent and dependent variables, and the scientific method, allowing students to grasp the importance of safety and scientific inquiry in chemistry.

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Understanding Laboratory Safety and Scientific Principles in Chemistry

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  1. 1. While working on a class chemistry experiment, Rachel dropped a glass test tube filled with an unknown liquid. What should Rachel do first? • Inform the teacher

  2. 2. The white ring on a glass graduated cylinder is to • prevent it from breaking when it falls

  3. 3. In the lab, what will protect you from acid that spills out of a beaker? • Apron • Goggles • Gloves

  4. 4. The best way to smell ammonia in a test tube is to take your hand and wave it over the test tube to lift the ammonia vapors towards your nose. This is called • wafting

  5. 5. True or false, eating food or chewing gum is allowed in the lab. • False!

  6. 6. Using one or more of your senses (sight, touch, sound, taste, and smell) to identify or learn about something • observation

  7. 7. A conclusion formed from available information or evidence • inference

  8. 8. A summary of observations • description

  9. 9.An interpretation of observations • explanation

  10. 10. A zebra has black and white stripes. This is an example of • An observation

  11. 11. Logan didn’t finish eating his lunch, he might be sick. • inference

  12. 12. Elephants weigh over 5 tons, is an example of an explanation or description • description

  13. 13. A scientific experiment that involves changing one factor and observing its effects on one thing while keeping all other things constant. • Controlled experiment

  14. 14. The variable that is changed (manipulated) in an experiment • Independent variable

  15. 15. The variable changes (responds) as a result of a change in the independent variable • Dependent variable

  16. 17. An explanation that can be tested with a scientific investigation. • hypothesis

  17. 16. A series of steps that scientists use when performing an experiment. • Scientific method

  18. 18. If the amount of water increases, then the height of the plant will increase. This is an example of • A hypothesis

  19. 19. Rene wanted to determine the effects of a soil pollutant on the growth of a sunflower plant. According to this information, what is the independent (manipulated) variable? • Soil pollutant

  20. 20. Physical Science is the study of • Matter and energy

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