States of Matter and Density Lecture Notes

Matter is anything that takes up space and has mass. The Particle Model states: 1. All matter is made of particles. 2. Particles have spaces between them. 3. Particles are always moving. 4. They move faster and get farther apart when heated. 5. Particles are attracted to each other.
   Materials consist of particles too small to see. Properties describe the appearance and behavior of substances.

States of Matter

Solids: Particles are closely packed, vibrating in fixed positions, resulting in rigid form and fixed volume without compressibility.
Liquids: Particles are loosely packed, moving fast and sliding past each other, taking the shape of their containers with fixed volume.
Gases: Particles are randomly arranged, moving rapidly with weak interparticle forces, having no fixed shape or volume and are compressible.

Gas Pressure

Pressure arises from gas particles colliding with container surfaces. More particles lead to more collisions and higher pressure.

Advanced States of Matter

Other states include Plasma and Bose-Einstein Condensate, with specific examples in solids, liquids, gases, and unique properties in plasma.

Density

Density is mass per volume, $\rho = \frac{m}{V}$, with units as $kg/m^3$ . For example, a metal with volume $4 \, m^3$ and mass $2,200 \, kg$ has a density of $550 \, kg/m^3$.

Density of a Liquid

To find liquid density, measure mass and volume, calculating density as above and averaging multiple measurements for accuracy.