HELP: Science Measurement Review & Additional Resources

Summary

• Measurements (quantitative observations) are more useful than qualitative observations.

• You should make measurements, even estimated ones, whenever possible.

• The system of units for measurements in physics is the SI system.

• At this time, the fundamental quantities are length, mass, and time.

• The SI unit for length is the meter and the standard meter is the distance light travels in  second in a vacuum.

• The SI unit for time is the second and the standard second is based on of the frequency of one type of radiation emitted by a cesium-133 atom.

• The SI unit for mass is the kilogram and is based on a mass stored in France.

• Prefixes are used to change SI units by powers of ten. 

Additional Resources

Jump to 0:53 in the timeline to find the information on measurement and units in this video.

US Customary units vs Metric Units

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