Unit conversion
What Unit conversion means in Combined Science GCSE, as defined for AQA.
Definitions of Unit conversion
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Reference: AQA
Converting between units such as millimetres, micrometres and metres so that image size and real size are in the same unit before dividing.
Changing image and real measurements to the same unit before calculating, for example millimetres to micrometres using 1 mm = 1000 µm.
Changing a time given in minutes, hours or milliseconds into seconds before substitution, by multiplying or dividing as required.
Changing a time given in minutes or hours into seconds before substituting, by multiplying minutes by 60 and hours by 3600.
Changing grams to kilograms by dividing by 1000, for example 450 g = 0.45 kg, before substituting into an equation.
Changing between watts and kilowatts, and between minutes or hours and seconds, when calculating energy in joules.
Topics that use Unit conversion
- Density of materials (AQA GCSE)
- Electrical charge and current (AQA GCSE)
- Energy transfers in everyday appliances (AQA GCSE)
- Microscopy (AQA GCSE)
Related terms
- Charge flow
- Coulomb
- Current
- time
- Changes of state and energy transfer
- Conservation of charge
- Conservation of energy
- Density
Using Unit conversion in the exam
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