The particle model - questions 1 - 10

Describe the arrangement and movement of particles in a solid.

Arrangement: particles touching, in a fixed position, held together by strong forces of attraction. Movement: vibrate in a fixed position.

State 3 properties of solids

High density,, fixed volume, fixed shape.

Describe the arrangement and movement of particles in a liquid.

Arrangement: particles are touching, forces of attraction are weaker than a solid. Movement: free to move randomly.

State 3 properties of liquids.

Lower density, fixed volume, can flow.

Describe the arrangement and movement of particles in a gas.

Arrangement: particles are spread out, very weak forces of attraction. Movement: move randomly at high speeds.

State 3 properties of gases.

Low density, no fixed volume or shape, can be compressed, can flow.

Why are changed of state physical changes?

No new substances are produced, the substance will have the same properties as before if the change is reversed.

What is the equation for calculating density?

Density (kg/m³)= mass (kg) ÷ volume (m³⁾

What is a Eureka can?

A piece of equipment used to measure the volume of an irregularly shaped object. Fill with water just below the spout. Place the object in ans measure the volume displaced.