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Year 11 Measurement
Measurement and Energy
Term | Definition |
---|---|
mass | a measure of the amount of matter in a body |
area | the amount of space inside the boundary of a flat (2-dimensional) object |
volume | the amount of 3-dimensional space an object takes up. |
length | how far from end to end. Or from one point to another |
precision | smallest unit on measuring instrument or limit of reading |
absolute error | the difference between the actual value and the measured value indicated by the instrument |
relative error | calculated by dividing the precision by the actual measurement |
standard form or scientific notation | used to write very large or very small number more conveniently |
significant figures | used to specify the accuracy of a number |
kilojoule | measures food energy |
power | rate at which energy is generated or consumed |
watt | is the SI unit of power |
energy consumption | is the amount of energy consumed per unit of time |