Measurements, Accuracy, Precision, and Instruments Flashcards

Flashcards about measurement, accuracy, precision, and instruments for an exam review.

What is measurement?

A technique in which the properties of an object are determined by comparing them to a standard quantity.

What are the key considerations when taking measurements to ensure data is accurate and precise?

Suitable instruments, suitable conditions, and a suitable method.

What does accuracy refer to?

How close a measurement is to the true or accepted value.

What does precision refer to?

How close measurements of the same item are to each other.

What is the relationship between precision and accuracy?

It is possible to be very precise but not very accurate, and it is also possible to be accurate without being precise.

What laboratory instrument is used to measure mass?

Triple Beam Balance

What laboratory instrument is used to measure length?

Metre Ruler

What laboratory instrument is used to measure time?

Stopwatch

What laboratory instrument is used to measure temperature?

Thermometer

What laboratory instrument is used to measure electric current?

Ammeter

What is the unit of mass?

gram (g)

What is the unit of length, using a Metre Ruler?

cm

What is the unit of time, using a stopwatch?

Minutes & seconds

What is the unit of temperature?

°C

What is the unit of electric current?

A