TEST 1 Review

1. TEST 1 Review

2. Students in a science class are conducting experiments causing strips of zinc to react with hydrochloric acid. Which pieces of safety equipment should each student have? (list three things)

3. Two students are working together in the laboratory. Each student fills a test tube withdifferent clear liquid and places it in a test tube rack. The test tubes are not labeled, and soon the students realize that they don't know which is which. What should they do?

4. A hypothesis is checked by

5. Grams are used to measure what?

6. You should report a cut in you skin, glass breakage, or a chemical spill

7. In Biology class, the students are asked to do an experiment that shows the effects of temperature on bacterial growth rates. Suggest two pieces of laboratory equipment needed for the experiment.

8. The situation in an experiment where no variables are introduced is the

9. Students fill a beaker with 100 milliliters of water. They plan to heat the beaker using a Bunsen burner for 25 minutes. They plan to take a temperature reading every minute. After heating the beaker for 20 minutes, one lab group notices that there is less than 5 milliliters of water in the beaker. What should the group do?

10. Graduated cylinders measure volume in _____________.

11. Four groups of rats are tested in a lab. Group 1 is given a special hormone for muscle growth. Group 2 is given a special multivitamin diet. Group 3 receives both the hormone treatment and the multivitamin diet. Group 4 does not receive any extra treatment or special diet. Which of the following groups is the control group for this experiment?

12. When is the only time that you should put chemicals back where you found them?

13. Why shouldn’t you wear dangling jewelry and baggy clothing to the laboratory?

14. Ryan noticed that his cola loses carbonation as it warms he knows it is carbon dioxide that causes cola to fizz. Ryan decided to do a scientific experiment to research this phenomenon. What is Ryan’s next step in the scientific method.

15. Which of the following will allowmeasurement of a liquid’s volume with the greatest precision?Meter stick with 5 m increments Meter stick with .5m incrementsMeter stick with .1cm incrementsMeter stick with 1 cm increments

16. This piece of equipment is used to handle liquids, but is not marked for accurate measurement.

17. During a laboratory activity, isopropyl alcoholis splashed into a student's eyes. What shouldthe student do? (List 3 things)

18. Why is it important not to plug in too many appliances into one socket?

19. When trying to determine mass of a heavy object, use

20. The density of an irregularly shaped floatingsolid must be calculated. Write the sequence on how to measure the density of this object. (remember you have to measure the mass and the volume)

21. You should report a chemical spill to your teacher_____________________.

22. A laboratory procedure is designed to compare reaction rates of different materials in four test tubes. The students must transfer exactly 20 mL of solution to all of the test tubes fairly quickly. Which of the following pieces of equipment is the best choice for measuring the solution and adding it to the test tubes?

23. If you were instructed heat something on the Bunsen burner, you would need to set your container on this to hold your container over the burner.

24. How should you pick up a piece of hot glassware?

25. A student wearing goggles, a lab apron, andthin latex gloves is best protected from—

26. This piece of equipment is used to filter solid materials from liquids.

27. A student uses a metal spoon to transfer copper powder from a jar onto a plastic tray. The student places the tray on a balance. To accurately measure an amount of copper powder using the balance, the student must know the mass of which object?

28. Keisha observes goldfish in an outdoor pond. The goldfish seems to be more active when the weather is warm than when it is cold. She asks herself, how do temperature changes affect goldfish? What would be a good hypothesis .

29. A student plans to mix ice, salt, and water in a container to create a cold-water bath. Which container will best insulate this mixture?

30. Reaching across a flame is _________________________________.

31. A student reads that mixing 20 milliliters of water with 20 milliliters of rubbing alcohol will produce a solution with a volume of less than 40 milliliters. The student wants to see if this is true. Which instrument should the student use to observe this phenomenon?

32. The group designed with a variable to test or invalidate the hypothesis is called the

33. A student heats a large glass beaker of water over a Bunsen burner. The student records the temperature of the water once every minute. The student's data is shown in the table below. Complete the data table if you were to predict the trend for the rest of the experiment.

34. Time (min.) Temp (ºC)

35. An educated guess is a/an ____________.

36. A student heats a large glass beaker of water over a Bunsen burner. The student records the temperature of the water once every minute. The student's data is shown in the table below. Complete the data table if you were to predict the trend for the rest of the experiment.

37. To determine the volume of irregularly shaped objects, a good method to use is

38. What is the correct chart or graph to use when displaying data that is in percentages?

39. Hot glass looks the same as _____________.

40. A teacher reads that playing music for students during tests will increase test scores. He separates his students into groups and plays them various types of music during a test. The test results for each group of students are listed in the table below.

41. What conclusion can be drawn from the data?

42. In order to protect your clothing, you should wear….

43. What is used as a source of heat in the laboratory?

44. What is the difference between mass and weight?

45. What has a specific markings for measurement. Used to accurately measure liquid volume.