How do strong and weak acids differ? Use lab tools on your computer to find out! Dip the paper or the probe into solution to measure the pH, or put in the electrodes to measure the conductivity. Then see how concentration and strength affect pH. Can a weak acid solution have the same pH as a strong acid solution?

How do strong and weak acids differ? Use lab tools on your computer to find out! Dip the paper or the probe into solution to measure the pH, or put in the electrodes to measure the conductivity. Then see how concentration and strength affect pH. Can a weak acid solution have the same pH as a strong acid solution?

Explore the interactions between various combinations of two atoms. Turn on the force arrows to see either the total force acting on the atoms or the individual attractive and repulsive forces. Try the "Adjustable Attraction" atom to see how changing the parameters affects the interaction.

Explore the interactions between various combinations of two atoms. Turn on the force arrows to see either the total force acting on the atoms or the individual attractive and repulsive forces. Try the "Adjustable Attraction" atom to see how changing the parameters affects the interaction.

How do you know if a chemical equation is balanced? What can you change to balance an equation? Play a game to test your ideas!

How do you know if a chemical equation is balanced? What can you change to balance an equation? Play a game to test your ideas!

The PhET project at the University of Colorado creates "fun, interactive, research-based simulations of physical phenomena." This particular one deals with Beer's Law. "The thicker the glass, the darker the brew, the less the light that passes through." Make colorful concentrated and dilute solutions and explore how much light they absorb and transmit using a virtual spectrophotometer! The simulation is also paired with a teachers' guide and related resources from PhET. The simulation is also available in multiple languages.

The PhET project at the University of Colorado creates "fun, interactive, research-based simulations of physical phenomena." This particular one deals with Beer's Law. "The thicker the glass, the darker the brew, the less the light that passes through." Make colorful concentrated and dilute solutions and explore how much light they absorb and transmit using a virtual spectrophotometer! The simulation is also paired with a teachers' guide and related resources from PhET. The simulation is also available in multiple languages.

Starting from atoms, see how many molecules you can build. Collect your molecules and see them in 3D!

Build an atom out of protons, neutrons, and electrons, and see how the element, charge, and mass change. Then play a game to test your ideas!

When will objects float and when will they sink? Learn how buoyancy works with blocks. Arrows show the applied forces, and you can modify the properties of the blocks and the fluid.

Watch your solution change color as you mix chemicals with water. Then check molarity with the concentration meter. What are all the ways you can change the concentration of your solution? Switch solutes to compare different chemicals and find out how concentrated you can go before you hit saturation!

How do greenhouse gases affect the climate? Explore the atmosphere during the ice age and today. What happens when you add clouds? Change the greenhouse gas concentration and see how the temperature changes. Then compare to the effect of glass panes. Zoom in and see how light interacts with molecules. Do all atmospheric gases contribute to the greenhouse effect?

Une série de simulations provenant de l’Université de Colorado à Boulder pour les 9e – 12e au sujet des sciences. Cette simulation démontre le processus des interactions atomiques.

Explorez les interactions entre diverses combinaisons de deux atomes. Activez les flèches de force pour voir soit la force totale agissant sur les atomes, soit les forces attractives et répulsives individuelles. Essayez l'atome "Attraction réglable" pour voir comment le changement des paramètres affecte l'interaction.

Are all atoms of an element the same? How can you tell one isotope from another? Use the sim to learn about isotopes and how abundance relates to the average atomic mass of an element.

Une série de simulations provenant de l’Université de Colorado à Boulder pour les 9e – 12e au sujet des sciences. Cette simulation démontre le processus du Laboratoire Loi de Beer-Lambert.

Le projet PhET à l'Université du Colorado crée des "simulations amusantes, interactives et basées sur la recherche des phénomènes physiques". Celle-ci en particulier aborde la loi de Beer. "Plus le verre est épais, plus la bière est foncée, moins la lumière passe à travers." Créez des solutions colorées concentrées et diluées et explorez la quantité de lumière qu'elles absorbent et transmettent à l'aide d'un spectrophotomètre virtuel ! La simulation est également accompagnée d'un guide pour les enseignants et de ressources connexes de PhET.

Students will predict bond polarity using electron negativity values; indicate polarity with a polar arrow or partial charges; rank bonds in order of polarity; and predict molecular polarity using bond polarity and molecular shape.

Do you ever wonder how a greenhouse gas affects the climate, or why the ozone layer is important? Use the sim to explore how light interacts with molecules in our atmosphere.

Une série de simulations provenant de l’Université de Colorado à Boulder pour les 9e – 12e au sujet des sciences.

«Vous demandez-vous parfois comment un gaz à effet de serre affecte le climat, ou pourquoi la couche d'ozone est importante ? Utilisez la simulation pour explorer comment la lumière interagit avec les molécules dans notre atmosphère.»

Une série de simulations provenant de l’Université de Colorado à Boulder pour les 9e – 12e au sujet des sciences.

«Les étudiants prédiront la polarité des liaisons en utilisant les valeurs de l'électronégativité ; indiqueront la polarité avec une flèche polaire ou des charges partielles ; classeront les liaisons par ordre de polarité ; et prédiront la polarité moléculaire en utilisant la polarité des liaisons et la forme moléculaire.»