Summaries after sample
,Sample
Summaries after sample
, Movement of particles: The concept of the particle
dissolving and diffusion model of matter
• All matter is made up of particles.
• Dissolving - when solid particles break up and spread
• The particles constantly move.
throughout a liquid.
• There is attraction and repulsion between particles.
• Diffusing - the movement of particles in liquids and gases
from high concentration areas to low concentration areas.
The 3 states of matter
Change of state of matter • Solids:
Gaining heat M5: Particle - Closely packed particles in a regular
Sample
arrangement.
model of matter - Strong forces of attraction.
• Adding heat to a solid cause the attractive
forces to break – the solid melts. (A) - Particles have very low kinetic energy.
• Adding heat to a liquid causes it to boil and
vaporise into gas. • Liquids:
- Particles are loosely arranged.
Summaries after sample
- Move spontaneously, slide past each
other and have high kinetic energy.
Losing heat - Have weaker forces than solids.
• Heat energy is given off when a gas changes
back into a liquid. • Gases:
Movement of particles: - Aren’t in a particular arrangement.
• Condensation – gas particles come closer
together and attractive forces increase. forces and spaces - Have extremely weak forces between
• Heat energy is also given off when a liquid them.
turns into a solid – freezing/ solidification.
Forces of attraction and - Very high kinetic energy.
repulsion between particles
• If the attraction forces are greater than the repulsion
forces, the particles come closer together – solids and
liquids.
• If the repulsive forces are stronger than the attractive
forces, the particles are further apart – gases.
• Heat makes the particles move faster and push each
other away more – causes a gas/liquid to expand.
•
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NS Mind Map