Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

Monthly Update sign up
Mailing List signup
Follow The Annenberg Learner on LinkedIn Follow The Annenberg Learner on Facebook Follow Annenberg Learner on Twitter

Physical Science: Session 2

Exploring the Model: Air

Introducing the Model

On the next page, we show a simulation of air, where the size of the air molecules has been increased and time has been slowed down.

In order to make the particles visible, we illustrate a very small volume — the side of the box is 161 x 10-10 m (or 161 angstroms, 1 angstrom = 10-10 m). For a sense of scale, each side of the box is 1/1000 the diameter of a human hair. At the scale of the simulation, each atom is approximately the correct size, shown as 3 x 10-10 m or 3 angstroms in diameter. This simulation is set up to show what air (a gas) at room temperature would look like.

A particle in this simulation is represented as a small sphere: blue for nitrogen (78% of the particles in air), red for oxygen (21% of the particles in air) and yellow for argon (about 1% of the particles in air). When you start the simulation by clicking “run,” you’ll see an animation in which each increment is 10-14 seconds — the real particles in air move much faster.


© Annenberg Foundation 2016. All rights reserved. Legal Policy