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Quizzes > Science

King Henry doesn't usually drink chocolate milk: Metric Prefix Quiz

Quick, free metric prefix quiz with instant results and tips.

Editorial: Review CompletedCreated By: Ladine MengUpdated Aug 24, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art showing metric prefix symbols measurement tools King Henry letters on sky blue background

This quiz helps you practice metric prefixes with the King Henry mnemonic and make quick, accurate unit conversions. Get instant feedback as you move decimals and spot common mistakes. For extra practice, try our unit conversion quiz, work through metric volume conversion practice, or check your knowledge with a fast prefix quiz.

In the mnemonic "King Henry Doesn't Usually Drink Chocolate Milk", which metric prefix does "King" represent?
hecto
deca
kilo
milli
"King" in the mnemonic corresponds to the kilo- prefix, which signifies a factor of 10^3 or one thousand. This helps students quickly recall that a kilometer is one thousand meters. The mnemonic is a common teaching tool for metric prefixes. See more at .
In the mnemonic phrase, what metric prefix does "Chocolate" stand for?
deci
centi
milli
micro
"Chocolate" corresponds to the centi- prefix, which means 10^-2 or one hundredth. For example, a centimeter is one hundredth of a meter. This mnemonic placement helps learners remember the prefix order. More details at .
How many meters are there in 8 kilometers?
80000 m
80 m
0.008 m
8000 m
The prefix kilo- means 1000. Therefore, 8 kilometers equals 8 × 1000 = 8000 meters. Converting between metric prefixes involves multiplying or dividing by powers of ten. See for more.
Which of the following is the SI base unit for mass?
kilogram
gram
liter
meter
The kilogram is the SI base unit for mass, defined by the Planck constant. Although the gram is commonly used, it is derived from the kilogram. This distinction is important in precise scientific measurements. More information at .
Convert 2500 milliliters to liters.
0.25 L
0.0025 L
2500 L
2.5 L
The milli- prefix denotes 10^-3, so 1 milliliter is 0.001 liters. Multiplying 2500 by 0.001 yields 2.5 liters. Converting between these units simply shifts the decimal point. Refer to .
Which instrument is most appropriate for measuring liquid volume to the nearest milliliter?
Pipette
Graduated cylinder
Burette
Volumetric flask
Graduated cylinders are calibrated in milliliter increments and are ideal for quick and reasonably precise volume measurements. Volumetric flasks and burettes offer higher precision for specific tasks, while pipettes are designed for small volumes. A graduated cylinder balances ease of use and milliliter precision. See .
Which metric prefix denotes a factor of 10^-1?
centi
milli
micro
deci
The deci- prefix means one-tenth, or 10^-1. For example, a decimeter is 0.1 meter. It appears as the fourth term in the mnemonic. More on metric prefixes at .
How many grams are there in 3.2 kilograms?
3200 g
3.2 g
0.32 g
32 g
Since kilo- means 1000, multiply 3.2 by 1000 to convert to grams, giving 3200 g. Converting between kilo and base units always involves shifting the decimal three places. For more, see .
Convert 0.005 kilometers to centimeters.
0.5 cm
5 cm
500 cm
50 cm
First, 0.005 km equals 5 meters (0.005 × 1000). Then, 5 meters equals 500 centimeters (5 × 100). Thus the full conversion yields 500 cm. Chain conversions move stepwise through prefixes. More info at .
A vernier caliper reads to the nearest 0.02 mm. What is the resolution of this instrument?
0.002 mm
0.02 mm
0.1 mm
0.2 mm
Resolution refers to the smallest increment an instrument can reliably display. A vernier caliper with 0.02 mm divisions can detect changes of that size. Higher precision instruments have smaller resolution values. Further reading at .
Using a digital scale that reads to the nearest 0.1 gram, you weigh a sample and see "12.3 g". What is the smallest unit this scale can measure?
0.01 g
0.001 g
1 g
0.1 g
The smallest unit (resolution) equals the smallest increment displayed - in this case, 0.1 gram. Digital scales list their readability, which indicates this value. It reflects the instrument's precision limit. See .
Convert 0.000045 kilometers into micrometers.
0.045 µm
45,000 µm
450,000 µm
4.5 µm
First convert kilometers to meters: 0.000045 km × 1000 = 0.045 m. Then convert meters to micrometers by multiplying by 10^6, yielding 45,000 µm. Multi-step conversions require careful power-of-ten tracking. Detailed conversion steps at .
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Study Outcomes

  1. Understand Metric Prefix Hierarchy -

    Learn the sequence and relative values of kilo, hecto, deca, base units, deci, centi, and milli to build a solid foundation in metric measurements.

  2. Recall the "King Henry" Mnemonic -

    Memorize and apply the mnemonic king henry doesn't usually drink chocolate milk to quickly organize and retrieve metric prefixes.

  3. Apply Metric Conversions -

    Perform unit conversions across different metric scales by shifting decimal places accurately using the mnemonic framework.

  4. Identify Measurement Tools -

    Recognize when to use a triple beam balance versus a vernier caliper for precise mass and length measurements.

  5. Read Triple Beam Balance Measurements -

    Interpret beam positions and calculate mass readings on a triple beam balance with confidence.

  6. Interpret Vernier Caliper Readings -

    Analyze the main scale and vernier scale graduations to determine exact length measurements using a caliper.

Cheat Sheet

  1. Mnemonic for Metric Prefixes -

    The phrase King Henry Doesn't Usually Drink Chocolate Milk corresponds to kilo (10^3), hecto (10^2), deca (10^1), base unit, deci (10^-1), centi (10^-2), and milli (10^-3). This simple mnemonic from NIST sources helps you visualize the metric staircase at a glance. Repeat it aloud before solving conversion problems to reinforce the sequence.

  2. Converting Between Units -

    To convert units, move the decimal point left or right according to the difference in prefix powers, such as converting 2.5 km to meters by multiplying by 10^3 for a result of 2,500 m. This technique is supported by guidelines from the International Bureau of Weights and Measures (BIPM). Practice with varied examples - like m→cm or mg→g - to build fluency.

  3. Using the Triple Beam Balance -

    Triple beam balances measure mass by adjusting three sliding weights along graduated beams until the pointer aligns with zero. According to Purdue University's physics lab manual, you should always tare the zero point before placing your sample to ensure accurate readings. Familiarize yourself with reading each beam (hundreds, tens, and ones of grams) for precise mass determination.

  4. Reading a Vernier Caliper -

    Vernier calipers offer high-precision measurements by combining a main scale with a sliding vernier scale, often accurate to 0.02 mm (as outlined by engineering standards). To read, align the zero marks, take the main scale reading, then add the vernier scale offset. Practice measuring rods or coins to quickly interpret both external and internal dimensions.

  5. Precision vs. Accuracy in Measurement -

    Precision refers to the consistency of repeated measurements, while accuracy denotes closeness to the true value; both are crucial when applying metric prefixes and tools like balances or calipers. The National Institute of Standards and Technology (NIST) emphasizes calibrating instruments and using appropriate prefixes to minimize error. Regular calibration checks and choosing the right unit scale enhance both precision and accuracy.

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