Accuracy vs. Precision/Metric system
A student shoots 4 arrows at a target. All four land in a tight cluster in the top-left corner, far from the bullseye. Describe their accuracy and precision.
What is High precision, low accuracy
How many significant figures are in the measurement 0.0045 g?
what is 2 significant figures
Solve and round to the correct number of significant figures: 2.1 cm x 4.32 cm
What is 9.1 cm^2
Express 45,000,000 meters in standard scientific notation.
What is 4.5 x 10^7 m
Using the aluminum experiment 2.5 g/cm^3 measured vs 2.7 g/cm^3 accepted), calculate the percent error.
What is 7.4% (or 7.41%)
A standard weight is known to be exactly 10.0 g. A digital balance reads 10.01 g, 10.00 g, and 9.99 g across three trials. Is this balance accurate, precise, or both?
what is both accurate and precise
How many significant figures are in 102.0 mL?
What is 4 significant figures
Solve and round to the correct rule: 12.11 g + 0.3 g
What is 12.4 g
Express 0.0000038 grams in standard scientific notation.
What is 3.8 x10^-6 g
Convert 310 K into degrees Celsius (C).
What is 37 degree C
A student weighs a 25.00 g sample three times and gets 20.10 g, 20.11 g, and 20.09 g. Does this data show high precision, high accuracy, or both?
What is High precision (low accuracy)
Why are the zeros at the end of 500 m considered non-significant unless a decimal point is shown?
what is they are trailing zeros without a decimal point, acting only as placeholders.
How many seconds are in 2.5 hours? Show or explain the steps using dimensional analysis.
What is 9,000 seconds
Convert 6.02 x 10^4 back into standard expanded notation.
What is 60,200
A student calculates a percent error of -12. Explain why this answer is written incorrectly according to the official formula.
What is percent error uses absolute value in the numerator, so it must always be reported as a positive number (12%).
Convert 0.0048 kilometers (km) into millimeters (mm).
What is 4,800 mm
How many significant figures are in 0.05030 km?
What is 4 significant figures
Using dimensional analysis, convert 4.50 gallons to liters. (1 gallon = 3.785liters)
What is 17.0 Liters
Why do scientists use scientific notation instead of standard numbers in their research and reporting?
What is to write extremely large or extremely small numbers in a compact, readable format that clearly shows significant figures.
A student measures the boiling point of pure water to be 97.0 C in the lab. The accepted value is 100.0 C. Calculate the student's percent error.
What is 3.0%
Convert 0.00075 hectograms (hg) into milligrams (mg).
What is 75mg
Identify the number of significant figures in both values: A) 3.00 x 10^8 m/s and B) 100. g
What is A) 3 significant figures; B) 3 significant figures
Solve and round to the correct number of significant figures:
What is 5.2 g/mL
Convert the number 0.000000045 grams into proper scientific notation.
What is 4.5 x 10^-8 g
A lab instrument measures a sample's temperature to be 300 Kelvin. Convert this temperature into Fahrenheit .
What is 80.33 F (or 80.3 F)