This lesson introduces the concept of mechanical energy as the sum of kinetic energy and potential energy. The lesson also examines objects in motion and the effects of changing velocities and forces on moving objects. Finally, the lesson discusses how the force of gravitation affects objects in the universe. Mechanical Energy Energy is the ability …
This lesson reviews a simple model of the atom and its role in the materials of everyday life. It then discusses waves in general and mechanical and electromagnetic waves in particular and applies these principles to optics. Matter and Atomic Structure The materials that are common to human experience (through sight, touch, and the other …
Meteorology is the study of Earth’s atmosphere with a focus on predicting weather patterns. Earth’s Resources All of the resources on Earth can be classified into two categories: renewable and nonrenewable. Renewable resources are natural resources that can be replenished over time, while nonrenewable resources cannot. All fossil fuels, a significant source of energy for …
Geology is the study of Earth and its physical components and how these components interact over time. Geologists use the information they learn to better understand Earth’s history and predict future geological processes. Earth’s Spheres Earth is made up of four distinct zones, or spheres, that each have unique characteristics: geosphere (land), hydrosphere (water), biosphere …
Are you ready to embark upon a journey through space and time? For centuries, scientists have sought to answer questions about our planet and its place in the universe. Astronomy is the study of the moon, stars, and other objects in space. Modern astronomy can be dated back to the time of the ancient Greeks, …
This lesson introduces the properties of acids and bases, including the various theories that define them. It also covers acid-base reactions and the pH scale. The following video will provide a review on Acids and Bases. Nature of Acids and Bases Acids are compounds that contain at least one hydrogen atom or proton (H+), which, …
This lesson discusses the properties of different types of mixtures, focusing on solutions. Then, it examines aspects of chemical reactions, including the components of the reactions and the types of changes that occur. The following videos will provide a review on the topics covered within Chemical Solutions. Chemical Reactions Part I: Chemical Formulas Chemical Reactions …
