Experimental design and separation techniques.-21[12.5] Flashcards
What is accuracy?
Accuracy is how close a measured value is to the true value.
What is precision?
The degree to which repeat measurements are consistent.
What is resolution?
Resolution is the degree of accuracy a measuring instrument has, for example of low resolution is 0.1g but a higher resolution is 0.001g.
What instruments are used to measure mass?
You can use:
1. A top pan balance for accurate results{Also depends on resolution}
2.A spatula can also be used.
What are the instruments used to measure time?
Stop clock/stopwatch
What are the instruments used to measure temperature?
They are:
1. Spirit/Mercury thermometer
2. Digital probe[Digital thermometer]
What is a control variable?
A control variable is a variable that stays the same throughout the whole experiment.
What is an independent variable?
Its a variable that changes throughout the experiment.
What is a dependent variable?
A dependent variable is a variable that is measured in an experiment.
