These eight free professional development videos for K-8 teachers present science concepts in energy. They are designed as a foundation for distinguishing "energy" as it is commonly understood and "energy" as it is defined in science. Teachers will explore the role of energy in motion, transfer and conversion of energy, energy systems, heat and work, and the notion of conservation of energy (energy can neither be created nor destroyed).
Editor's Note: The videos are structured to provide intensive support for teachers to update content knowledge in energy, which is especially important to meet revised science curriculum standards being adopted by many states. The project developer also offers graduate credits, with an associated fee, for those who are interested.
This collection is part of a larger set of video workshops published and maintained by the Annenberg Foundation. Other workshop topics in physical science include Forces and Motion, Chemistry, and Light.
6-8: 4E/M1. Whenever energy appears in one place, it must have disappeared from another. Whenever energy is lost from somewhere, it must have gone somewhere else. Sometimes when energy appears to be lost, it actually has been transferred to a system that is so large that the effect of the transferred energy is imperceptible.
6-8: 4E/M2. Energy can be transferred from one system to another (or from a system to its environment) in different ways: 1) thermally, when a warmer object is in contact with a cooler one; 2) mechanically, when two objects push or pull on each other over a distance; 3) electrically, when an electrical source such as a battery or generator is connected in a complete circuit to an electrical device; or 4) by electromagnetic waves.
6-8: 4E/M3. Thermal energy is transferred through a material by the collisions of atoms within the material. Over time, the thermal energy tends to spread out through a material and from one material to another if they are in contact. Thermal energy can also be transferred by means of currents in air, water, or other fluids. In addition, some thermal energy in all materials is transformed into light energy and radiated into the environment by electromagnetic waves; that light energy can be transformed back into thermal energy when the electromagnetic waves strike another material. As a result, a material tends to cool down unless some other form of energy is converted to thermal energy in the material.
6-8: 4E/M4. Energy appears in different forms and can be transformed within a system. Motion energy is associated with the speed of an object. Thermal energy is associated with the temperature of an object. Gravitational energy is associated with the height of an object above a reference point. Elastic energy is associated with the stretching or compressing of an elastic object. Chemical energy is associated with the composition of a substance. Electrical energy is associated with an electric current in a circuit. Light energy is associated with the frequency of electromagnetic waves.
11. Common Themes
6-8: 11A/M2. Thinking about things as systems means looking for how every part relates to others. The output from one part of a system (which can include material, energy, or information) can become the input to other parts. Such feedback can serve to control what goes on in the system as a whole.
11C. Constancy and Change
6-8: 11C/M2. A system may stay the same because nothing is influencing it or the influences on it are balanced.
6-8: 11C/M4. Symbolic equations can be used to summarize how the quantity of something changes over time or in response to other changes.
9-12: 11C/H4. Graphs and equations are useful (and often equivalent) ways for depicting and analyzing patterns of change.
%0 Electronic Source %D January 31, 2011 %T Science in Focus: Energy %I Annenberg Foundation %V 2015 %N 28 July 2015 %8 January 31, 2011 %9 application/flash %U http://www.learner.org/workshops/energy/
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