Matter

Chapter Four: Density and Buoyancy

Density The mass of the object per unit volume Expressed in units of g/ml or g/cm³ It’s a characteristic property of all matter All objects have a specific density and it can be used as an identifier Density equals mass divided by volume…… or density equals heart.

4.1 Density There are two other forms of the equation. Mass equals density X volume Volume equal mass ÷ density

Displacement In a graduated cylinder or other measuring device, place a known amount of water. Add the irregular object and measure the increase in volume. This is the volume of the object, as long as it is submerged

Density On the Atomic Level More dense materials have a more tightly packed group of atoms and molecules. Less dense materials have a less tightly packed grouped of atoms and molecules.

Density and States of Matter Solids are usually more dense than liquids and liquids more dense than gases. Water is less dense as a solid than a liquid.