Scientific Measurements

Measurements

- the process of estimating or determining the magnitude of a quantity, such as length or mass, relative to a unit of measurement, such as metre or kilogram.

Units of Measurements

- Definite magnitude of a physical quantity, defined and adopted by convention and/or by law that is used as a standard for measurement of the same physical quantity.

SI BASE UNIT

1) Meter for length 

2) Kilogram for mass 

3) Second for time 

4) Kelvin for temperature 

Calibration

- Comparison between measurements - one of known magnitude or correctness made or set with one device and another measurement made in as similar a way as possible with a second device.

Accuracy

  - The degree of closeness of measurements

- Correctness, Exactitude, Exactness, truth

Precision

- The state or quality of being precise; exactness.

Place Values

 for whole numbers:

PRACTICE HERE: http://www.aaamath.com/plc41ax3.htm

for decimals:

 PRACTICE HERE: http://www.aaamath.com/plc51bx2.htm#pgtp