B6Tools-Tools of the Trade Student
EQUIPMENT AND MEASUREMENT
SAFETY
No horseplay is permitted in lab.
PROCEDURE
Work with a partner and begin the lab at an open station. Answer the questions that relate to that station, but do not move on until every group is ready to move. Move clockwise around the room until you have completed all 12 stations. Some questions do not have just one exact answer and some are asking for your opinion. Make sure that you and your partner agree on answers and complete identical lab sheets. No help will be received from other groups or from the teacher.
STATION #1
1. If the numbered marks on the ruler represent centimeters, then the tiny unnumbered marks represent ______.
2. Use the measuring tape to measure the circumference of the apple at its widest point. _____ cm
3. What is the circumference of the apple in meters? _____ m
4. One meter is approximately ____ feet
STATION #2
5. What is the first thing you must do when using a triple beam balance?
6. What is the mass of the shell? ______g
STATION #3
7. Measure the length, width, and height of the block of wood in centimeters
length=______cm width= ______cm height=______cm
8. Calculate the volume of the block of wood.
V = l x w x h = ______cm3
STATION #4
9. What is the mass and diameter of the marble? ______g ______mm
10. Use water displacement to find the volume of the marble. This is done by placing 10 ml of water in the graduated cylinder, then place the marble in the water. The difference in volume will be the volume of the marble. ______ml
11. Calculate the density of the marble. ______g/ml
D =_ m_ *Be sure to pour out water and marble before leaving this station
V
STATION #5CHEM
12. Name the labeled pieces of equipment:
A= ______B= ______C= ______
13. Place a weigh boat on the balance and tare (zero) the balance
Using a scoopula, transfer one scoop of rock salt to the mortar. Use the mortar and pestle to crush the salt. Again use the scoopula to transfer the crushed salt to the weigh boat. Measure and record the mass of the salt. ______g
Discard the salt as instructed by your teacher.
STATION #5BIO
12. This bacterial culture incubated for 24 hours. There are ______colonies in one grid (pie shape).
13. Estimate the total number of colonies in the petri dish. ______colonies
STATION #6
14. What is the volume of the bottle of water in ounces listed on the label? ______oz
15. Use the graduated cylinder to measure the volume of the water in mL. Each time you fill the graduated cylinder, pour the water into the beaker. Then, carefully pour the water back into the bottle using the funnel and cap the bottle. Compare your answer to the label. Was the label truthful? Explain your answer.
16. What is the volume of the bottle of water in liters? ______L
STATION #7BIO
17. Refer to the diagram to identify the revolving nosepiece. Locate the revolving nosepiece on the microscope and turn in. What does turning this part allow for? ______
______.
18. Refer to the diagram to identify the iris diaphragm. Locate the iris diaphragm on the microscope. Turn on the microscope. Open and close the iris diaphragm by moving it back and forth. Based on your observations, what is this part used for? ______
STATION #7CHEM
17. Name the labeled pieces of equipment:
A= ______B= ______C= ______
18. If the buret was originally filled to the “0” mark, how much liquid has been released from the buret? ______
Remember to always read the volume from the bottom of the meniscus.
STATION #8
19. The micropipette reads 1000 μL. How many milliliters does this equal? ______ mL
20. Name another unit that could be used to measure volume?
Practice using the micropipette by loading one well with 6 μL in the provided model.
a) Press the micropipette to its first stop.
b) Place it in the sample and release the plunger.
c) Place the micropipette with fresh tip into a well. press the plunger to the second stop.
d) Remove from well, release plunger, & eject tip.
STATION #9
21. Which piece of equipment contains the most water?
22. What is the capacity of the each flask? ______ml
23. What would be an advantage of a flask over a beaker when determining capacity when measuring volume?
STATION #10
24. Which piece of equipment would be best to use when measuring 5 mL of liquid?
______
25. Which piece of equipment would be best to use when measuring 150 mL of liquid? ______
26. Which piece of equipment would be best to use when heating 5 mL of liquid?
______
*Each piece of equipment is used only once.
STATION #11
27. Which of these pieces of equipment would be best to use if you were transferring
1.0 ml of liquid into a well of this well plate? ______
28. Which piece of equipment would be used to transfer 3 mL of liquid? ______
29. Which piece of equipment would be best to use to drop small drops when accurate measurement is not as important? ______
*Each piece of equipment is used only once.
STATION #12
30. Fill a beaker half way with ice water. What is the temperature of the water in the beaker after 30 seconds? _____ °C
31. Fill another beaker half way with room temperature water. What is the temperature of the water in the beaker after 30 seconds? _____ ◦C
*Be sure to pour the water and ice back into the containers provided before leaving this station.
December 10, 2013 Page 1 of 4