PheT Interactives
"Overview: 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 Level: High School Material T...
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Featured STEM Providers
Coulomb's Law
"Overview: Visualize the electrostatic force that two charges exert on each other. Observe how changing the sign and magnitude of the charges and the distance between them affects the electrostatic force. Subject: Elect...
Signal Circuit
"Overview: Why do the lights turn on in a room as soon as you flip a switch? Flip the switch and electrons slowly creep along a wire. The light turns on when the signal reaches it. Subject: Electronic Technology Level:...
Molecule Polarity
"Overview: 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 polarit...
Stern-Gerlach Experiment
"Overview: The classic Stern-Gerlach Experiment shows that atoms have a property called spin. Spin is a kind of intrinsic angular momentum, which has no classical counterpart. When the z-component of the spin is measured...
Gene Machine: The Lac Operon
"Overview: Build a gene network! The lac operon is a set of genes which are responsible for the metabolism of lactose in some bacterial cells. Explore the effects of mutations within the lac operon by adding or removing...
Microwaves
"Overview: How do microwaves heat up your coffee? Adjust the frequency and amplitude of microwaves. Watch water molecules rotating and bouncing around. View the microwave field as a wave, a single line of vectors, or the...
Radio Waves & Electromagnetic Fields
"Overview: Broadcast radio waves from KPhET. Wiggle the transmitter electron manually or have it oscillate automatically. Display the field as a curve or vectors. The strip chart shows the electron positions at the trans...
Under Pressure
"Overview: Explore pressure under and above water. See how pressure changes as you change fluids, gravity, container shapes, and volume. Subject: Physics Level: High School Material Type: Simulation Author: Ariel Paul,...
States of Matter Basics
"Overview: Heat, cool and compress atoms and molecules and watch as they change between solid, liquid and gas phases. Subject: Physics Level: High School Material Type: Simulation Author: Emily Moore, John Blanco, Kathy...
Stretching DNA (AR)
"Overview: Explore stretching just a single strand of DNA using optical tweezers or fluid flow. Experiment with the forces involved and measure the relationship between the stretched DNA length and the force required to...
Rutherford Scattering (AR)
"Overview: 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 bounci...
Gas Properties (AR)
"Overview: Pump gas molecules to a box and see what happens as you change the volume, add or remove heat, change gravity, and more. Measure the temperature and pressure, and discover how the properties of the gas vary in...
Lasers (AR)
"Overview: Create a laser by pumping the chamber with a photon beam. Manage the energy states of the laser's atoms to control its output. Subject: Physics Level: Middle School, High School, Community College / Lower Div...
Balloons & Buoyancy (AR)
"Overview: Experiment with a helium balloon, a hot air balloon, or a rigid sphere filled with different gases. Discover what makes some balloons float and others sink. Subject: Physics Level: Middle School, High School,...
Photoelectric Effect (AR)
"Overview: See how light knocks electrons off a metal target, and recreate the experiment that spawned the field of quantum mechanics. Subject: Physics Level: High School, Community College / Lower Division Material Typ...
Build a Molecule
"Overview: Starting from atoms, see how many molecules you can build. Collect your molecules and see them in 3D! Subject: Chemistry Level: High School Material Type: Simulation Author: Christine Denison, Emily Moore, Jo...
Density
"Overview: Why do objects like wood float in water? Does it depend on size? Create a custom object to explore the effects of mass and volume on density. Can you discover the relationship? Use the scale to measure the mas...
Pendulum Lab
"Overview: Play with one or two pendulums and discover how the period of a simple pendulum depends on the length of the string, the mass of the pendulum bob, and the amplitude of the swing. It's easy to measure the perio...
Gene Expression - The Basics
"Overview: Express yourself through your genes! See if you can generate and collect three types of protein, then move on to explore the factors that affect protein synthesis in a cell. Subject: Genetics Level: High Scho...
Area Model Algebra
"Overview: Build rectangles of various sizes and relate multiplication to area. Discover new strategies for multiplying algebraic expressions. Use the game screen to test your multiplication and factoring skills! Subjec...