Unit 1- Review Flashcards
What is the base quantity for length?
Meters (m)
What is the base quantity for mass?
Kilograms (kg)
What is the base quantity for time?
Seconds (s)
What is the base quantity for temperature?
Kelvin (k)
What is the base quantity for the amount of substance?
Mole (mol)
What is the factor for mega (M)?
10^6
What is the factor for kilo (k)?
10^3
What is the factor for hecto (h)?
10^2
What is the factor for decka (da)?
10^1
What is the factor for deci (d)?
10^-1
What is the factor for milli (m)?
10^-3
What is the factor for micro?
10^-6
What is the factor for nano (n)?
10^-9
Define precision.
Refers to reproducibility (the ability to reproduce) of a measurement.
Define accuracy.
Indicates how close a measurement is to the true or accepted value.
What is the control in an experiment?
The element that does not receive the change by another variable.
What is a quantitative variable?
Any variables where the data is represented in number; age for example
What are qualitative variables?
Any variable that describes physical characteristics; color for example
What is a hypothesis?
A tentative, testable statement of prediction about what has been observed
What is a theory?
A explanation of a natural phenomenon based on many observations and investigations over time
What is a law?
A relationship in nature that is supported by many experiments.
In sig figs, which digit is uncertain?
The last one
What are two causes of uncertainty in the uncertain digit in sig figs?
Human error and Instrument error
What is the derived unit for frequency?
Hertz (Hz)
