Measurements
The three basic dimensions of physics
What are length, mass, and time?
This describes a phenomenon without explaining it
What is a law?
What is 4.200 cm?
The number of significant figures in the quantity 10 students
What is zero?
The SI base unit of time
What is the second?
The SI base unit for mass
What is the kilogram?
A well-tested explanation supported by evidence
What is a theory?
This is what it means for measurements to be accurate but not precise
What is they are close to the actual value, but not to each other?
The reason that percent error is a useful measurement of accuracy
What is it shows how much error you have relative to the size of the actual value?
Measurements include these two things
What are a number and a unit?
The number of milliliters in 7.2 liters
What is 7200 mL?
A description of the order of steps in the scientific method
What is observe a phenomenon, develop a hypothesis, design and conduct an experiment, analyze data, report conclusions?
An assessment of accuracy and precision for a measuring instrument that gives consistent, but incorrect measurements
What is precise, but not accurate?
The percent error of a measurement of 5.0 m if the correct value is 4.5 m?
What is 11%?
Eratosthenes is famous for this
What is calculating the size of the earth?
The SI base unit for electric current
What is the Ampere?
The process by which experimental results are evaluated by other scientists is called this
What is peer review?
Dart throws that are both accurate and precise will look like this
What is close to each other and close to the bullseye?
The number of significant figures in 0.004050 nm
What is four?
The number of liters that is equivalent to 15 microliters
What is 0.000015 liters?
The number of seconds that is equal to 4,100,000 microseconds
What is 4.1 seconds?
The three characteristics of a good hypothesis
Darts on a dartboard with high precision but low accuracy would look like this
What is close together, but far from the bullseye?
The percent error of a measurement if the measured value is .95 m and the actual measurement is 1.00 m
What is -5.0%?
The SI prefix that means billionth or 10-9
What is nano?