Topic Summaries
Accuracy and precision
Energy and power
Renewable energy and efficiency
Charge, current, and electric fields
Potential difference and resistors
Electricity
Volume and gases
States of matter and heat capacity
Radiation
Nuclear fusion and fission
Forces
Velocity and acceleration
Gravity and Newton's Laws
Moments and elastic potential
Pressure
Stopping, braking, and momentum
Properties of waves
Electromagnetic waves
Refraction and lenses
Light, colour, and ray diagrams
Absorbing and emitting infrared radiation
Magnetic fields
Motor effect, generator effect, and transformers
Science skills: Experimental procedures
Science skills: Presenting and using data
Science skills: Measuring results
Energy and power
Renewable energy and efficiency
Charge, current, and electric fields
Potential difference and resistors
Electricity
Volume and gases
States of matter and heat capacity
Radiation
Nuclear fusion and fission
Forces
Velocity and acceleration
Gravity and Newton's Laws
Moments and elastic potential
Pressure
Stopping, braking, and momentum
Properties of waves
Electromagnetic waves
Refraction and lenses
Light, colour, and ray diagrams
Absorbing and emitting infrared radiation
Magnetic fields
Motor effect, generator effect, and transformers
Science skills: Experimental procedures
Science skills: Presenting and using data
Science skills: Measuring results
- The true value of a measurement is the value that would be obtained in an experiment without errors.
- The accuracy of a measurement is how close it is to the true value.
- The precision of a repeated experiment is how close together the measurements are.
- Accuracy and precision are two separate concepts. An accurate measurement is not necessarily precise and vice versa.
- A measurement is repeatable if the results are similar when the experiment is performed again by the same investigator, under the same conditions. This implies the measurements are precise.
- A measurement is reproducible if the results are similar when the experiment is performed again by a different investigator with different equipment. This implies the measurements are accurate.
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