FORM 4: 1.6 MEANINGS

ITEM	MEANING
PHYSICS	Physics is the study of natural phenomena and the properties of matter.
PHYSICAL QUANTITY	A physical quantity is a physical characteristic that can be measured.
BASE QUANTITY	Base quantity is quantity that cannot be defined in terms of other base quantities.
DERIVED QUANTITY	A derived quantity is one which is obtained by combining base quantities by multiplication, division or both these operations.
SCALAR QUANTITIES	Scalar quantities are quantities that have magnitude but no direction.
VECTOR QUANTITIES	Vector quantities are quantities that have both magnitude and direction.
CONSISTENCY	The consistency of a measuring instrument is its ability to register the same reading when a measurement is made repeatedly.
ACCURACY	Accuracy of a measurement is how close the value of the measurement to the actual value.
SENSITIVITY	Sensitivity of an instrument is its ability to detect a small change in the quantity to be measured.
ERROR	Error is the difference between the actual value of a quantity and the value obtained in measurement.
ZERO ERROR	Zero error is the systematic error that occurs when the pointer of the instrument does not return to zero when not in use.
PARALLAX ERROR	Parallax error is the random error that occurs due to the incorrect positioning of the eyes in taking reading.