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ACT Science Flashcards: Understanding Measurement And Precision

Study Understanding Measurement And Precision in ACT Science with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

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What this deck covers

This deck focuses on Understanding Measurement And Precision, giving you a quick way to review the definitions, rules, and examples that matter most for ACT Science.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

ACT Science Flashcards: Understanding Measurement And Precision

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QUESTION

Convert 1000 millimeters to meters.

Tap or drag to reveal answer

ANSWER

1 meter. Divide by 1000 to convert mm to m.

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All flashcards

Flashcard 1: Convert 1000 millimeters to meters.

Answer: 1 meter. Divide by 1000 to convert mm to m.

Flashcard 2: Convert 5000 grams to kilograms.

Answer: 5 kilograms. Divide grams by 1000 to get kg.

Flashcard 3: Convert 2.5 hours to minutes.

Answer: 150 minutes. 2.5×60=1502.5 \times 60 = 1502.5×60=150 minutes.

Flashcard 4: Convert 0.002 kilograms to grams.

Answer: 2 grams. Multiply kg by 1000 to get grams.

Flashcard 5: Express 0.00056 in scientific notation.

Answer: 5.6×10−45.6 \times 10^{-4}5.6×10−4. Move decimal 4 places right for negative exponent.

Flashcard 6: State the formula for calculating volume of a rectangular prism.

Answer: Volume=length×width×height\text{Volume} = \text{length} \times \text{width} \times \text{height}Volume=length×width×height. Multiply three dimensions for rectangular volume.

Flashcard 7: What is the standard unit of length in the International System of Units (SI)?

Answer: Meter (m). Base unit for distance measurement in SI.

Flashcard 8: Which unit is used to measure time in the International System of Units (SI)?

Answer: Second (s). Base unit for time duration in SI.

Flashcard 9: Identify the standard unit of temperature in the International System of Units (SI).

Answer: Kelvin (K). Absolute temperature scale starting at absolute zero.

Flashcard 10: What unit is used to measure electric current in the International System of Units (SI)?

Answer: Ampere (A). Base unit for electrical flow rate.

Flashcard 11: Which standard unit is used for measuring the amount of substance in the International System of Units (SI)?

Answer: Mole (mol). Base unit for counting particles or molecules.

Flashcard 12: What is the formula for converting Celsius to Kelvin?

Answer: K=°C+273.15K = °C + 273.15K=°C+273.15. Add 273.15 to convert from Celsius to absolute temperature.

Flashcard 13: What is the formula for converting Fahrenheit to Celsius?

Answer: °C=(°F−32)×59°C = (°F - 32) \times \frac{5}{9}°C=(°F−32)×95​. Subtract 32, then multiply by 59\frac{5}{9}95​ to convert.

Flashcard 14: Round 0.004567 to three significant figures.

Answer: 0.00457. Round the fourth digit up since the fifth is 6.

Flashcard 15: How many significant figures are in the measurement 0.00450?

Answer:

  1. Count non-zero digits and zeros between them.

Flashcard 16: Round 123.4567 to four significant figures.

Answer: 123.5. Round the fifth digit down since the sixth is 5.

Flashcard 17: What is the definition of accuracy in measurement?

Answer: Closeness of a measurement to the true value. Accuracy measures how close to the true value.

Flashcard 18: Define precision in the context of measurement.

Answer: Repeatability or consistency of measurements. Precision measures how consistent repeated measurements are.

Flashcard 19: Identify the error type: Instrument misalignment during measurement.

Answer: Systematic error. Consistent bias affects all measurements the same way.

Flashcard 20: Identify the error type: Random fluctuations in temperature affect readings.

Answer: Random error. Unpredictable variations cause random measurement differences.

Flashcard 21: What is the standard unit of mass in the International System of Units (SI)?

Answer: Kilogram (kg). Base unit for mass in the metric system.

Flashcard 22: Convert 1500 milliliters to liters.

Answer: 1.5 L. Divide by 1000 to convert milliliters to liters.

Flashcard 23: State the formula for calculating percent error.

Answer: Percent Error=|Experimental - True|True×100\text{Percent Error} = \frac{\text{|Experimental - True|}}{\text{True}} \times 100Percent Error=True|Experimental - True|​×100. Formula compares experimental result to true value.

Flashcard 24: A measurement is 100.0 cm. Its true value is 98.5 cm. Calculate the percent error.

Answer: 1.52%. ∣100.0−98.5∣98.5×100=1.52%\frac{|100.0-98.5|}{98.5} \times 100 = 1.52\%98.5∣100.0−98.5∣​×100=1.52%

Flashcard 25: How many millimeters are there in a meter?

Answer: 1000 mm. Standard metric conversion: 1 m = 1000 mm.

Flashcard 26: Express 7.89×1037.89 \times 10^37.89×103 in standard numerical form.

Answer:

  1. Move decimal 3 places right for positive exponent.

Flashcard 27: Which is more precise: 0.0025 or 0.00256?

Answer: 0.00256. More decimal places means higher precision.

Flashcard 28: How many centimeters are there in a meter?

Answer: 100 cm. Standard metric conversion: 1 m = 100 cm.

Flashcard 29: Convert 25 mm to centimeters.

Answer: 2.5 cm. Divide by 10 to convert millimeters to centimeters.

Flashcard 30: Which is more accurate: A measurement of 9.8 cm or 10.0 cm for the true value of 10 cm?

Answer: 10.0 cm. 10.0 cm is exactly the true value.