Science Safety and Scientific Method

1. Which of the following is NOT proper attire when doing a lab? Closed toed shoes Hair loose and down Goggles Gloves 2. What should you do if you spill a chemical? Stay clear of the spill Notify students around you Notify your instructor All of the above 3. After completing an experiment, all chemical wastes should be left at your station for the next class. disposed of according to your instructor’s directions. dumped in the sink. taken home. 4. What is the proper procedure for smelling a chemical? Put your nose lose and breath deeply Point it away from nose and fan towards you Never smell a chemical Smell it like anything else 5. Personal eyeglasses provide as much protection as safety glasses. true false 6. What should be done if a chemical gets in the eye? Notify the Instructor; then use the eye-wash fountain Use the eye-wash fountain; return to the experiment Nothing, unless the chemical burns 7. If a piece of equipment is not working properly, stop, turn it off, and tell your lab partner your best friend in the class the science instructor the custodian 8. When you are heating a substance in a test tube, always point the open end of the tube toward yourself toward your lab partner toward another classmate away from all people 9. What is a hypothesis? Your best “educated guess” after researching your question. an experiment what you learned in class a conclusion based on data from an experiment 10. Which is not part of a scientific experiment? Verification Variable Constant Control 11. What is the purpose of an experiment? to communicate data to test a hypothesis to prove a scientific law none of the above 12. Which of the following steps comes first during the scientific method? Analyzing data Forming a hypothesis Performing an experiment Sharing your results 13. What is an independent variable? the variable you purposefully manipulate the variable that is being observed the variable that is not changed there is no such thing in an experiment 14. If you do not understand a direction or part of a lab procedure, you should figure it out as you do the lab. try several methods until something works. ask the instructor before proceeding. skip it and go on to the next part. 15. In an experiment what you keep the same is the independent variable dependent variable constant variable no variable