MATTER
The Particle Theory
Particle Theory of Matter
1. All matter is made of small particles
Particle Theory of Matter
2. Each substance has its own kind of particle, which
is different from other substances
Particle Theory of Matter
3. Particles attract each other
•
When particles are closer, the attraction is stronger
4. Particles are always moving
•
•
Particles possess kinetic energy
Particles vibrate, rotate, and translate
Particles attract and always moving
Particle Theory of Matter
5. Particles move quickly at high temperatures, and
move slowly at low temperatures
heating and cooling particles
Explain

Solids have a hard rigid shape and a
definite volume

#3 – particles are very close together and
attract eachother
Explain

Carbon monoxide is a poisonous gas
but carbon dioxide is not, even though
they both consist of carbon and
oxygen

#2 – each substance has its own kind of
particle which is different from other
substances
Explain

A balloon filled with helium gas shrinks
when taken outside on a cold winter
day

#5 – particles move more slowly at cooler
temperatures and thus, move closer
together
Explain

In which container will a tablespoon of
sugar dissolve faster: in a cup of hot
tea or in a glass of iced tea (neither is
stirred)

#5 – in a cup of hot tea: particles are
moving faster and therefore, they spread
apart more quickly