Scientific Measurements / Lab Tools Flashcards
Which tool is best suited to measure the length of a bedroom?
Surveyor’s wheel
Tape measure
Ruler
Calipers
Tape measure
A chemist needs to add 5 µL of a reagent to a reaction solution. Which of the following is the best tool to accomplish this?
A 1-mL pipette
A volumetric flask
A micropipette
A volumetric pipette
A micropipette
Extra:
A micropipette is used to measure extremely small volumes of liquids, typically on the microliter scale, hence the name!
Which would be the approximate mass of a car?
180 kg
1,800 kg
180,000 kg
18 kg
1,800 kg
Which of the following would an electron microscope be used to measure?
The strength of chemical bonds
20-nm polymer films
Insect samples
Aquatic samples
20-nm polymer films
Correctly order the following prefixes from smallest to largest: milli, kilo, deci, micro, nano.
deci, micro, nano, milli, kilo
nano, micro, milli, deci, kilo
milli, nano, kilo, deci, micro
nano, milli, kilo, deci, micro
nano, micro, milli, deci, kilo
Which of the following is true about SI Units?
SI Units are derived from the Imperial System.
The SI base units can be broken down into other units.
SI Units are the standard measurement system in science.
There are 8 SI base units.
SI units are the standard measurement system in science.
A chemist was performing a spectroscopy experiment on a fluorescent dye to examine the influence of concentration on absorbance. To accomplish this, the chemist created a stock solution of a certain concentration of dye using 10 mL of water (H2O). Then, a serial dilution was performed by taking 1 mL of the stock solution and diluting it with 9 mL of water for a total solution volume of 10 mL. 1 mL was taken from Solution 2 and diluted with 9 mL water to create Solution 3. The serial dilution was performed through Solution 5, as shown in the diagram below. If the dye concentration in Solution 5 was 0.5 g/mL, what was the concentration of the dye in Solution 2?
500 g/mL
50 g/mL
5 gmL
5,000 g/mL
500 g/mL
Extra;
0.5g/mL * 10 = 5g/mL (Solution 4)
5g/mL * 10 = 50g/mL (Solution 3)
50g/mL * 10 = 500g/mL (Solution 2)
When going to the grocery store, you need to purchase some vegetables, which are sold by weight. Which of the following units would the weight of the vegetables be expressed in?
Coulombs
Kilograms
Pascals
Newtons
Kilograms
Which of the following is not an SI base unit?
Meter
Liter
Kilogram
Second
Liter
Which of the following units is derived from SI base units?
Kilometer
Pound
Dram
Mile
Kilometer
In an experiment, a reaction requires 0.006 kg of KCl, but the scale used to measure the mass only reports masses in grams (g). Which of the following values would the scale read if the exact mass of KCl was measured?
600 g
6 g
60 g
0.6 g
6 g
Which of the following prefixes would likely be the most appropriate for measuring the weight of a 2,500 g kitten?
Pico
Nano
Kilo
Giga
Kilo
Which of the following would be the best choice to measure 0.0015 grams of a chemical reagent?
Metric ruler
Graduated cylinder
Triple beam balance
Analytical balance
Analytical balance
A book weighs 2.2 kg. How much does it weigh in grams?
0.22 g
2,200 g
22 g
220 g
2,200 g
Which of the following is the correct formula to measure volume?
Volume = length x width x height
Volume = length2 x height + width
Volume = 2(height + width) – length
Volume = length3 x width2 x height
Volume = length x width x height
