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.
Section Assessment
Thinking Critically 16. Much discussion has focused on the need to drive more efficient cars and use less electricity. If the law of conservation of energy is true, why are people concerned about energy usage ? people is using energy for things that are not important . 17. if heat flows in only one direction, how can both hot and cold liquids reach room temperature as they sit on a table? hot looses heat and goes to the air and the air goes to the cold . 18. think about what happens to jack and jill in the nursery room. what kinds of enrgy are used? how was each energy form used? both, kinetic and potential energy because if they are moving they are using kinetic energy and if they dont is potential energy. 19. compare the 3 temperature scales you learned about. how are they different? how are they similar? in the celsius scale water freezes at 0° and boils at 100 ° farenheit scale water freezes at 32 ° and boils at 212 ° kelvin scale is known as
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