Measurement and Equipment Flashcards
1
Q
Accuracy
A
How close a measurement is to the accepted value
2
Q
Precision
A
How close measurements are to each other
3
Q
How close measurements are to each other
A
Precision
4
Q
How close a measurement is to the accepted value
A
Accuracy
5
Q
How do you use a triple beam balance?
A
- Start with the heaviest weights (100’s), then work your way down to the 10’s and the 1’s
- Line up the two markings
6
Q
How do you use electronic scales?
A
- Plug in and turn on
- Set up and stabilize prior to using device (match the bubble up with the circle)
- Do this by turning the legs or base supports until the bubble is aligned with the circle
- Then re-zero the value, press the button to zero your start value
7
Q
What does an Erlenmeyer flask look like?
A
8
Q
What does a beaker look like?
A
9
Q
What does a thermometer look like?
A
10
Q
What does a graduated cylinder look like?
A
11
Q
Why is the line where the liquid ends curved?
A
It is curved due to the surface tension.
12
Q
Where should the readings of a measurement of liquid be taken from?
A
They should be taken from eye level at the bottom of the meniscus.
13
Q
What is a meniscus?
A
The curve in the surface of a liquid, produced by surface tension
