States of matter Solid : fixed shape and fixed volume Example: wood, salt, iron metal,... Liquid: fixed volume and no fixed shape Example: water, mercury,... Gas: no fixed volume and no fixed shape Example: air, hydrogen,... Measuring quantities of matter Mass (m) : using balance Mass is related to atomic theory Volume (v): using apparatus Density : using mass and volume (D = m / v) Scientific method Experiment: observation of some phenomenon Law: general rules made from experimental observations.
(general rules; made; from experimental observations)
general rules
made
from experimental observations