Unit 1 Chapter 3 Density Study Guide Flashcards

Vocabulary flashcards generated from the Unit 1 Chapter 3 Density Study Guide covering concepts of density, mass, volume, molecular arrangement, and water displacement.

Density Formula

The mathematical expression for density, given by $\text{Density} = \frac{\text{mass}}{\text{volume}}$, which is measured in units of $\text{g/cm}^3$ (grams per cubic centimeter).

Density and Mass Relationship

The relationship where, if two substances have the same volume, the substance with greater mass has the greater density because it contains more mass in that same volume.

Density Comparison of Copper and Aluminum

A comparison showing that a copper cube has more mass than an aluminum cube of equal volume because copper is denser than aluminum.

Molecular Properties of Glass vs. Plastic

The structural comparison where glass molecules have more mass, may be smaller in size, and are packed more closely together compared to plastic molecules, making glass much denser.

Atomic Packing and Density

The concept that a substance composed of smaller, less massive atoms can still have a greater density if its atoms are packed more closely together.

Water Displacement Method

A technique for finding the volume of a sample by measuring the initial water level, submerging the object, and subtracting the original water level from the new level.

Water Displacement Volume Calculation

The volume calculation of an object that causes the water level in a graduated cylinder to rise from $50\,\text{mL}$ to $59\,\text{mL}$, resulting in a volume of $9\,\text{mL}$.

Displacement Error for Floating Objects

The measurement error that occurs when a floating object is not submerged just beneath the water surface, resulting in a measured volume that is lower than the actual volume of the object.

Density Invariance of Fresh Water

The principle that different volumes of room temperature fresh water always maintain the same density because it remains the same substance at the same temperature.

Method for Finding Water Density

The procedure using an electronic scale to measure the mass of water and a graduated cylinder to measure its volume, then calculating density as $\text{Density} = \frac{\text{mass}}{\text{volume}}$.

Density of Room Temperature Fresh Water

The density value for room temperature fresh water, which is about $10\,\text{g/cm}^3$.