Measurements
Measurements 2
Lab Safety
Lab Tools
6000
3. What is the volume of the water in the graduated cylinder below?
1) 141 mL 2) 142 mL 3) 143 mL 4) 144 mL
142 mL
6000
Base your answer to the following question on the diagram below.
The difference between leaves A and B is closest to
a) 20 mm b) 20 cm c) 2 m d) 4 cm
20 mm
6000
f you do not understand a direction or part of a laboratory procedure, you should
a) figure it out as you do the lab
b) try several methods until something works
c) ask the teacher before proceeding
d) skip it and move on to the next part
ask the teacher before proceeding
6000
Used to hold liquids, may not give an accurate reading for volume
beaker
7000
5. A diagram of the actual size of a peppered moth wingspan is shown below.
An estimated length of the wingspan could be
1) 3 centimeters 2) 3 grams
3) 3 milliliters 4) 3 kilometers
3 centimeters
7000
Find the mass
536.8 g
7000
Which of these pictures shows the correct way to pick up a heated test tube?
a) b) c) d)
a
7000
Used to place water on a slide
pipette or dropper
8000
The diagram below shows a wasp positioned next to a centimeter ruler. What is the length of the entire wasp (antenna to its back)?
1) 1.4 cm 2) 20 mm
3) 3.5 cm 4) 35 mm
20mm
8000
What is the approximate length of a wing of this wasp? 1) 35 mm 2) 1.4 mm 3) 3.5 cm 4) 14 mm
14 mm
8000
When heating liquid materials in laboratory glassware, a student should always
- wear safety goggles
- use Benedict’s solution
- stopper the test tube
- record the temperature of the liquid
- wear safety goggles
8000
Approved eye protection devices, such as goggles, are worn in the laboratory
a) to avoid eye strain
b) to improve your vision
c) only if you do not have glasses
d) any time chemicals, heat, or glassware are used
any time chemicals, heat, or glassware are used
9000
What is the length of section A?
1) 75 mm 2) 11.5 cm
3) 4.5 cm 4) 40 mm
4.5 cm
9000
21. The diagram below represents a graduated cylinder containing a liquid.
How many milliliters of fluid should be added to the graduated cylinder to raise the volume to 24 milliliters?
1) 10 2) 7 3) 8 4) 4
8
9000
9. Which statement represents an unsafe procedure for heating a nutrient solution in a flask?
1) heat the solution at the lowest temperature possible on a hot plate
2) stopper the flask tightly to prevent evaporation of the solution
3) use a Bunsen burner to heat the solution
4) stir the solution while it is heating
2) stopper the flask tightly to prevent evaporation of the solution
9000
Zebra finches are small black-and-white birds that lay eggs about the size of a bean seed. Which unit of measurement is best for accurately measuring the length of these eggs?
a) millimeters b) micrometers
c) feet d) meters
millimeters
10000
. What is the volume of the liquid in the graduated cylinder shown below?
1) 23 mL 2) 26 mL
3) 27 mL 4) 28 mL
26mL
10000
17. The diagram below represents a thermometer that is inside an incubator.
A student needs to incubate a bacterial culture at 50°C. According to the reading on the thermometer, how many degrees must the temperature in the incubator be increased to reach this temperature?
1) 10 2) 6 3) 9 4) 13
13
10000
Explain why putting stoppers in the test tubes could be dangerous.
They could explode in the student's face
10000
During an investigation, a student measures out 15 grams of salt. Then, he measures 15 milliliters of water and adds the salt to it. Next, he measures a 1 centimeter wide by 4 centimeters long section of plant leaf. Which list of tools is arranged in the order that the student used them?
- graduated cylinder, ruler, balance
- balance, ruler, graduated cylinder
- graduated cylinder, balance, ruler
- balance, graduated cylinder, ruler
- balance, graduated cylinder, ruler