In this video Paul Andersen explains the first step in the design process, defining and delimiting the engineering problem. Design requires a clear definition of the problem and this is done by addressing both the constraints and criteria of each solution. This will become increasingly important as future problems require complex solutions. A K-12 teaching progression is also included.
PS3.D: Energy in Chemical Processes and Everyday Life
In this video Paul Andersen explains how energy is used in chemical processes and everyday life. Students should understand that energy is neither created or destroyed but is converted. Most of the energy is delivered to our planet from the sun and is harvested through the process of photosynthesis. A K-12 teaching progression is also included.
PS3.A: Definitions of Energy
In this video Paul Andersen attempts to explain the age old questions - What is Energy? Even though it comes in many forms one of the defining characteristics of energy is that it is conserved over time. He then explains that all energy is either a function of motion, due to its position within a field or radiation. A teaching progression K-12 is also included.
SEP6: Constructing Explanations and Designing Solutions
Paul Andersen explains how scientists modify theories by constructing explanations. He also discusses the cycle of design used by engineers to solve problems. He starts by defining a theory as a well-established explanation of a phenomenon that is refined over time. Examples discussed in the video include the big bang theory, the germ theory and the theory of natural selection. He also lays out a progression for building this skill in students.
