physics eoy - y9

Accuracy

Result that is close to the true value

Precision

All results are very close to each other

Interval

Quantity between readings

Resolution

Smallest change in the quantity being measured

Range

Minimum and maximum values

Uncertainty

Interval within which the true value can lie

Measurement error

Incorrect measurement of a quantity

Random error

Reading varies each time

Systematic error

Constant deviation in readings

Repeatable

Getting the same result with the same method

Reproducible

Getting the same results with a different method or by someone else

Zero error

Reading doesn't start at zero

Conductor

Material that allows heat energy to move through

Insulator

Material in which heat energy doesn't move freely

Energy transfer by conduction

Transfer of energy through a material depending on its thermal conductivity

Specific heat capacity (SHC)

Amount of heat energy required to raise the temperature of 1kg of a substance by 1 degree Celsius

Density

Mass per unit volume

States of matter

Solid, liquid, gas with different properties

Internal energy

Energy stored by the particles of a substance

Specific latent heat (SLH)

Energy needed to melt or boil 1kg of a substance without changing its temperature

Gas pressure and temperature

Increasing temperature increases gas pressure in a sealed container

Gas pressure and volume

Pressure and volume are inversely proportional, described by Boyle's Law