 Density A lesson on integrity and science. Density is…. A periodic property How did Mendeleev know there was a missing element? He calculated the densities.

Presentation on theme: "Density A lesson on integrity and science. Density is…. A periodic property How did Mendeleev know there was a missing element? He calculated the densities."— Presentation transcript:

Density A lesson on integrity and science

Density is…. A periodic property How did Mendeleev know there was a missing element? He calculated the densities and they increased down a family

So Remember: Density: mass per unit volume A measure of how compact molecules are in a substance. Determines whether an object will sink or float in a fluid.

Archimedes Principle There is a relationship between an object being able to float (or buoyancy ) and the mass of the fluid that was displaced.

This box is filled with water

The object displaces some of the water

The amount of the fluid displaced depends on the density of the object versus the density of the fluid.

How to find the volume of an irregular shaped object Measure a known amount of water in a graduated cylinder Place the object in the water Then find the volume of water it displaces in a graduated cylinder, by subtracting the initial volume from the final volume Divide mass by volume

Solid Liquid Gas

For example: Density of water is 1 g/ml. Wood has a density of 0.6 g/ml; Therefore, wood floats in water.

Formula for Density Density = mass / volume or D = m/v.

Density = mass/volume Volume = mass /density Mass = density X volume m v D

So now, let’s calculate the density for the Coke and Diet Coke. 1. Mass the Coke on the balance. 2. Then divide it by the volume (ml on the can) 3. Your final answer will be the density.

When you write density, the unit you use is (the number) g/ml For example: 3.4 g/ml

Download ppt "Density A lesson on integrity and science. Density is…. A periodic property How did Mendeleev know there was a missing element? He calculated the densities."

Similar presentations