1. The kinetic theory of matter
Arrangement of
State of Matter Arrangement and Movement of Particles
Matter
SOLID  The particles are packed closely
 Has a fixed together in an orderly manner.
volume and  There are strong forces between
shape the particles.
 Cannot be  The particles can only vibrate and
compressed rotate about their fixed positions.
LIQUID
 Has fixed  The particles are packed closely
volume but
together but not in orderly
does not have
arrangement.
fixed shape
 Held together by strong forces but
(takes the
weaker than the forces in a solid.
shape of
 The particles can vibrate, rotate
container)
and move throughout the liquid.
 Cannot be
They collide against each other.
compressed
easily
 The particles are very far apart
GAS
from each other and in a random
 Does not have
motion.
a fixed shape or
 Weak forces between the particles.
volume
 The particles can vibrate, rotate
 Can be
and move freely. The rate of
compressed
collision is greater than the rate of
easily
collision in a liquid.