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Band Structure (AR)
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Explore the origin of energy bands in crystals of atoms. The structure of these bands determines how materials conduct electricity.

Subject:
Physics
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Chris Malley
Kathy Perkins
Sam McKagan
Date Added:
07/02/2010
Black Box Lab
Conditional Remix & Share Permitted
CC BY-NC-SA
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Students gather evidence about the contents of a sealed container and make predictions about the contents. Provides a good introduction to how scientists have determined the composition of atoms.

This activity also works well to discuss the nature of science in developing hypotheses, various ways of collecting data, and drawing supported conclusions.

Subject:
Chemistry
Science
Material Type:
Activity/Lab
Date Added:
01/15/2019
CK-12 Physical Science Concepts for Middle School
Conditional Remix & Share Permitted
CC BY-NC-SA
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CK-12 Physical Science Concepts covers the study of physical science for middle school students. The 5 chapters provide an introduction to physical science, matter, states of matter, chemical interactions and bonds, chemical reactions, motion and forces, and the types and characteristics of energy.

Subject:
Chemistry
Science
Material Type:
Textbook
Provider:
CK-12 Foundation
Provider Set:
CK-12 FlexBook
Author:
Jean Brainard, Ph.D.
Date Added:
11/01/2012
Concord Consortium: Phase Change
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This interactive activity for grades 8-12 features eight models that explore atomic arrangements for gases, solids, and liquids. Highlight an atom and view its trajectory to see how the motion differs in each of the three primary phases. As the lesson progresses, students observe and manipulate differences in attractions among atoms in each state and experiment with adding energy to produce state changes. More advanced students can explore models of latent heat and evaporative cooling. This item is part of the Concord Consortium, a nonprofit research and development organization dedicated to transforming education through technology.

Subject:
Mathematics
Material Type:
Data Set
Diagram/Illustration
Full Course
Interactive
Lecture Notes
Provider:
Concord Consortium
Provider Set:
Concord Consortium Collection
Author:
The Concord Consortium
Date Added:
05/11/2011
Davisson-Germer: Electron Diffraction
Unrestricted Use
CC BY
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Simulate the original experiment that proved that electrons can behave as waves. Watch electrons diffract off a crystal of atoms, interfering with themselves to create peaks and troughs of probability.

Subject:
Physics
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Kathy Perkins
Sam McKagan
Sam Reid
Date Added:
10/02/2006
Models of the Hydrogen Atom
Unrestricted Use
CC BY
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How did scientists figure out the structure of atoms without looking at them? Try out different models by shooting light at the atom. Check how the prediction of the model matches the experimental results.

Subject:
Physics
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Chris Malley
Kathy Perkins
Michael Dubson
Mindy Gratny
Sam McKagan
Wendy Adams
Date Added:
01/01/2007
Nuclear Fission
Unrestricted Use
CC BY
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Start a chain reaction, or introduce non-radioactive isotopes to prevent one. Control energy production in a nuclear reactor! (Previously part of the Nuclear Physics simulation - now there are separate Alpha Decay and Nuclear Fission sims.)

Subject:
Physics
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
John Blanco
Kathy Perkins
Noah Podolefsky
Ron LeMaster
Sam McKagan
Wendy Adams
Date Added:
07/19/2011
Nuclear Fission (AR)
Unrestricted Use
CC BY
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Start a chain reaction, or introduce non-radioactive isotopes to prevent one. Control energy production in a nuclear reactor! (Previously part of the Nuclear Physics simulation - now there are separate Alpha Decay and Nuclear Fission sims.)

Subject:
Physics
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
John Blanco
Kathy Perkins
Noah Podolefsky
Ron LeMaster
Sam McKagan
Wendy Adams
Date Added:
07/02/2008
Reactions & Rates
Unrestricted Use
CC BY
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Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? What affects the rate of a reaction?

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Kathy Perkins
Linda Koch
Mindy Gratny
Ron LeMaster
Trish Loeblein
Date Added:
11/15/2007
Reactions & Rates (AR)
Unrestricted Use
CC BY
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Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? What affects the rate of a reaction?

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Kathy Perkins
Linda Koch
Mindy Gratny
Patricia Loblein
Ron LeMaster
Date Added:
12/02/2010
Rutherford Scattering (AR)
Unrestricted Use
CC BY
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How did Rutherford figure out the structure of the atom without being able to see it? Simulate the famous experiment in which he disproved the Plum Pudding model of the atom by observing alpha particles bouncing off atoms and determining that they must have a small core.

Subject:
Physics
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Chris Malley
Kathy Perkins
Michael Dubson
Sam McKagan
Wendy Adams
Date Added:
03/02/2011
Salts & Solubility
Unrestricted Use
CC BY
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Add different salts to water, then watch them dissolve and achieve a dynamic equilibrium with solid precipitate. Compare the number of ions in solution for highly soluble NaCl to other slightly soluble salts. Relate the charges on ions to the number of ions in the formula of a salt. Calculate Ksp values.

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Danielle Harlow
Kathy Perkins
Linda Koch
Ron LeMaster
Trish Loeblein
Wendy Adams
Date Added:
04/01/2006
What is a Molecule?
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Educational Use
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This video/animation shows that a molecule of water is made up of oxygen and hydrogen atoms. When oxygen and hydrogen atoms exist alone, their properties are different from the properties they have when they are chemically combined to form a water molecule.

Subject:
Chemistry
Physics
Science
Material Type:
Lecture
Provider:
PBS LearningMedia
Provider Set:
Teachers' Domain
Date Added:
04/09/2007
pH Scale (AR)
Unrestricted Use
CC BY
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Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize the relative number of hydroxide ions and hydronium ions in solution. Switch between logarithmic and linear scales. Investigate whether changing the volume or diluting with water affects the pH. Or you can design your own liquid!

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Archie Paulson
Chris Malley
Jack Barbera
Kathy Perkins
Laurie Landgon
Patricia Loblein
Wendy Adams
Date Added:
07/02/2012