In the videos they say that energy is the ability to do work.Gas has energy and energy can be stored.They talk about a lot of types of energy, they say that the light works with electrical energy, then they show fire and that it is produced by heat energy, they say that kinetic energy is de energy of motion and potential energy is the one that not comes from motion. they also say hat energy cannot be created or destroyed but it can transform from one form of energy to another. when an object have potential and kinetc energy at the same time it is mechanical energy, chemical energy is realized when food is broken down, gravitational energy is the energy caused by gravity. energy that comes from the sun is solar energy ,they show an example of the panels and they say that at the day the panels store the energy of the sun and at night they used it and hydel energy is the one that comes from water.
Essay
How Does A Solid Become Liquid The higher temperature in an object, the faster the molecules move. When the temperature of ice reaches 0° C, t he molecules break free. The movement its very large that that the attractive forces of each other molecules cant hold them in place then the crystal structure collapse and the ice become water. When a substance change from solid to liquid is called melting point . Freezing When ice is melt and become water it can be reversed by cooling the liquid. When water melt the particles slow down and come closer together. This process is called freezinng point . The temperatureis constant while the crystal structure forms and heat is released. Viscosity is a materials resistance to flow, glass has no freezing point because when the temperature of the liquid decreases it becomes more viscous, it becomes thicker and resistant to flow.
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