Video Notes: Mass, Density, and Particle Diagrams

Vocabulary flashcards covering mass, density, volume, systems, particle diagrams, and graph relationships as described in the video notes.

Mass

Amount of matter in an object; doesn't change with location.

Particle diagram

Drawing using particles to show arrangement, spacing, volume, or density.

Law of Conservation of Mass (LOCOM)

Mass is conserved in a closed system; it cannot be created or destroyed.

Density

How much mass is in a given volume (mass/volume).

Density (particle-level description)

How close particles are packed in a volume.

System

The part of the universe being studied.

Volume

The space a substance occupies (in cm^3 or mL).

Cubic centimeter (cm^3)

Unit of volume; 1 cm^3 = 1 mL.

Milliliter (mL)

Unit of volume; 1 mL = 1 cm^3.

Density definition 1

ho = m/V (mass divided by volume).

Density definition 2

Number of particles per unit volume.

Density definition 3

Ratio of a substance's density to a reference substance (like water).

Sinking or floating by density

Objects denser than liquid sink; less dense objects float.

Identify unknown substances by density

Find out what a substance is by comparing its density to known densities.

Density from a mass

volume graph

On a mass vs. volume graph, the slope is density (
ho = \Delta m/\Delta V).

1 cm^3 = 1 mL

One cubic centimeter equals one milliliter.

Particle diagrams for different densities

Diagrams showing high (packed) and low (loose) density particles.

System focus of diagrams

The system is what the particle diagrams focus on.