This simulation shows conduction of thermal energy within and between solids, based on the kinetic energy of particles, and collisions between neighboring particles. The material is distributed in accordance with the CC BY. See details at: https://creativecommons.org/licenses/by/4.0/

In this interactive, students look at actual endoscopic images from a healthy person and from M’Kenna, the patient presented in the unit. They take a tour of the digestive system stopping at different points to look at images. The material is distributed in accordance with the CC BY. See details at: https://creativecommons.org/licenses/by/4.0/

General College Chemistry introduces students to the study of chemistry using an atoms-first approach. The first unit, Atoms, explores the structure of atoms, while reviewing the key historical studies and experiments that led to our modern understanding. Electronic structure and periodic trends are also presented. The second unit, Molecules, presents various models of bonding including Lewis Structures, Valence Bond Theory, and Molecular Orbital Theory, and further develops concepts of isomerism, molecular shape and polarity. The third unit, Interactions, explores the ways that systems of molecules interact with each other, leading to bulk scale properties. These are exemplified using gases and condensed phases and emphasizing intermolecular interactions. The fourth unit, Reactions, introduces chemical equations, reaction stoichiometry, and basic thermochemistry concepts to explore the ways that matter can be rearranged and the energy associated with those changes. The material is distributed in accordance with the CC BY. See details at: https://creativecommons.org/licenses/by/4.0/

This simulation allows students to make observations about the structure and movement of particles in a liquid. The material is distributed in accordance with the CC BY. See details at: https://creativecommons.org/licenses/by/4.0/

This simulation helps students feel what happens to the sound when you adjust the loudness and pitch. It asks students “What do you feel happen when you touch the speaker?” and “What do you hear happen to the sound?” The material is distributed in accordance with the CC BY. See details at: https://creativecommons.org/licenses/by/4.0/

Tài liệu được phân phối tuân theo Giấy phép CC BY-NC-ND. Xem chi tiết tại https://creativecommons.org/use-remix/cc-licenses/

This textbook is designed for English language learners at the intermediate high level (ACTFL proficiency scale) who are aiming to improve their oral communication skills to reach the next sublevel: advanced low. The corresponding ELC level for this textbook is Academic B. The material is distributed in accordance with the CC BY-NC. See details at: https://creativecommons.org/licenses/by-nc/4.0/

"Mountains move! And there are ocean fossils on top of Mt. Everest! In this plate tectonics and rock cycling unit, students come to see that the Earth is much more active and alive than they have thought before. The unit launches with documentation of a 2015 Himalayan earthquake that shifted Mt. Everest suddenly to the southwest direction. Students also discover that Mt. Everest is steadily moving to the northeast every year and getting taller as well. Students wonder what could cause an entire mountain to move during an earthquake. Students investigate other locations that are known to have earthquakes and they notice landforms, such as mountains and ridges that correspond to earthquake patterns. They read texts, explore earthquake and landform patterns using a data visualization tool, and study GPS data at these locations. Students develop an Earth model and study mantle convection motion to explain how Earth’s surface could move from processes below the surface. From this, students develop models to explain different ways plates collide and spread apart, ultimately explaining how Mt. Everest could move all the time in one direction, and also suddenly, in a backward motion, during an earthquake. The unit ends with students using what they have figured out about uplift and erosion to explain how a fossil was found at Mt. Everest without having to dig for it." The material is distributed in accordance with the CC BY. See details at: https://creativecommons.org/licenses/by/4.0/

With this free online tone generator, students enter their desired frequency and press play. The material is distributed in accordance with the CC BY. See details at: https://creativecommons.org/licenses/by/4.0/