Sal shows how to determine the magnetic force between two currents going in opposite directions. Created by Sal Khan.

Sal explains the difference between liquids and gasses (both fluids). He then starts a calculation of the work done on a liquid in a U-shaped container. Created by Sal Khan.

This in class worksheet is designed to get students to think about and manipulate different accelerations in their head. Students work together with written descriptions of velocity and acceleration and draw the vectors in part one, and then turn that around in part two where they write descriptions of a car's motion based on the vector pictures they are given.

This is a set of lecture notes for my course Relativity for Poets at Fullerton College. It's a nonmathematical presentation of Einstein's theories of special and general relativity, including a brief treatment of cosmology.

This activity provides instructions for using a flashlight and aquarium (or other container of water) to explain why the sky is blue and sunsets are red. When the white light from the sun shines through the earth's atmosphere, it collides with gas molecules with the blue light scattering more than the other colors, leaving a dominant yellow-orange hue to the transmitted light. The scattered light makes the sky blue; the transmitted light makes the sunset reddish orange. The section entitled What's Going On? explains this phenomena.

In this activity, students study the range of colors in a visible light spectrum created from either a glass prism or holographic diffraction grating. This activity is in unit 2 of the "Space-Based Astronomy" guide that contains background information, worksheets, assessment activities, extensions, and alignment to national education standards.

In this activity, students construct three-dimensional models from terrain information provided by two-dimensional topographic maps. This will allow them to visualize how changes in elevation over a certain distance can be represented on a flat piece of paper that can be folded up and tucked away. Each group is responsible for constructing a model of Mount St. Helens 'before' and 'after', a depression, a stream, and a hill. Discussion questions related to the different representations are also included.

This activity challenges students to try and meet the world's projected energy demand over the next century, decade by decade, by manipulating a menu of available energy sources in the online Energy lab simulator all while keeping atmospheric CO2 under a target 550ppm.

Open Educational Resources (OER)
Resources for finding open and sustainable teaching and learning materials.

Survey of atmospheric and oceanic phenomena including the discussion of observations and theoretical interpretations. Topics covered include: monsoons; El Nino; planetary waves; atmospheric synoptic eddies and fronts; gulf stream rings; hurricanes; surface and internal gravity waves; and tides. In this course, we will look at many important aspects of the circulation of the atmosphere and ocean, from length scales of meters to thousands of km and time scales ranging from seconds to years. We will assume familiarity with concepts covered in course 12.003 (Physics of the Fluid Earth). In the early stages of the present course, we will make somewhat greater use of math than did 12.003, but the math we will use is no more than that encountered in elementary electromagnetic field theory, for example. The focus of the course is on the physics of the phenomena which we will discuss.

Learn to connect position-time and velocity-time graphs. Explore velocity using an animated car icon connected to either a position-time or a velocity-time graph, or both. Then investigate other motion graphs.

This course includes Quantitative introduction to physics of the solar system, stars, interstellar medium, the Galaxy, and Universe, as determined from a variety of astronomical observations and models. Topics: planets, planet formation; stars, the Sun, "normal" stars, star formation; stellar evolution, supernovae, compact objects (white dwarfs, neutron stars, and black holes), plusars, binary X-ray sources; star clusters, globular and open clusters; interstellar medium, gas, dust, magnetic fields, cosmic rays; distance ladder; galaxies, normal and active galaxies, jets; gravitational lensing; large scaling structure; Newtonian cosmology, dynamical expansion and thermal history of the Universe; cosmic microwave background radiation; big-bang nucleosynthesis. No prior knowledge of astronomy necessary. Not usable as a restricted elective by physics majors.

In this lesson on cosmic rays, students will explain two examples of a cosmic ray detector. Includes information about student preconceptions and a demonstration that requires a geiger counter and optional access to a small radioactive source that emits energetic helium nuclei (alpha particles), e.g., the mineral the mineral autunite, which contains uranium. This is activity two of four from The Cosmic Ray Telescope for the Effects of Radiation (CRaTER).

Subject studies how and why machines work, how they are conceived, how they are developed (drawn), and how they are utilized. Students learn from the hands-on experiences of taking things apart mentally and physically, drawing (sketching, 3D CAD) what they envision and observe, taking occasional field trips, and completing an individual term project (concept, creation, and presentation). Emphasis on understanding the physics and history of machines.

In the story Wings, Ikarus Jackson is shunned and tormented by his peers, as well as community members because of his unique physical appearance.

IntroductionThis lesson seed includes lesson plans and resources to assist Social Studies teachers in elementary classrooms.  These is a section dedicated to grades 1-3 that focuses on map skills, modes of transportation, how goods are transported and how people change the earth.  There is also a section dedicated to grades 4-5 that focuses on the physical features and grography of Maryland and the United States. At the bottom of the resources is an academic vocabulary word list for key concepts to consider providing visual support to assist you in tailoring your lessons to ELL students within your classroom, along with link to WIDA CAN DO Descriptors.Lesson Seeds:Lesson seeds are ideas for the standards that can be used to build a lesson. Lesson seeds are not meant to be all-inclusive, nor are they substitutes for instruction. This lesson seed provides a compelling question and a bank of sources to use to drive an inquiry based lesson or a potential Evidence Based Argument Set (EBAS). When developing lessons from these seeds, teachers must consider the needs of all learners. Once you have built your lesson from the lesson seed, teachers are encouraged to post the lesson that has emerged from this lesson seed and share with others. 

Sal shows how to determine the magnetic force between two currents going in the same direction. Created by Sal Khan.