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Explore Chapter 12 With Me!

 


Follow along to learn more about chapter 12 of the course text!
Citation: DeRosa, D. A., & Abruscato, J. (2019). Teaching Children Science: A Discovery Approach (Ninth ). Pearson. 
Chapter 12: Energy, Technology/ Engineering
Learning Objectives: 
12.1 Develop a working definition of energy 
12.2 Explain relationships between energy and forces
12.3 Explain how energy transfer is related to potential energy, kinetic energy, and work 
12.4 Describe how waves relate to energy 
12.5 Identify properties of electrical, sound, light, and heat energy
The flow of energy is central to Earth systems. The scientific and engineering communities expressed energy in a variety of ways. At its most basic, energy can be defined as the ability to do work or effect change. 

The transformation and transfer of energy enables us to harness energy to sustain life, move mountains, and run computers.

Potential energy refers to objects, large or small, that are in a state of being able to release energy when forces are applied to them. Potential energy increases as one moves away from the source of the force. We are probably most aware of potential energy as a result of an object's height above the ground. Kinetic energy is associated with motion and is produced when an object moves as a result of a force acting on it. The force of gravity acting on objects dropped from great heights is well known to most people.

The law of energy conservation reminds us that energy cannot be destroyed. Fortunately, it is possible to convert it from one form to another. 

Waves of energy travel through space, and their amplitude and wavelength can be used to describe them. Energy is transmitted through media such as water and air by displacing the media perpendicular to the wave rather than moving it in the direction of the wave. Electrical and magnetic energy, displace electrical and magnetic fields.

Static electricity is caused by the movement of electrons between atoms, which accumulates a charge that is eventually discharged to another object. The constant flow of electrons through conductors is referred to as current electricity. Waves can be used to describe both sound and light energy. Light energy can travel through a vacuum, whereas sound energy requires a medium. Heat energy is a function of a substance's internal energy as a result of the movement of molecules within the substance. 
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