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Chapter 3 Energy - Coggle Diagram
Chapter 3 Energy
3.1 Energy exists in different forms
mechanical energy
energy that moves objects
Ex. putting a book on a shelf
sound energy
vibration of particals in a solid
Ex. When a car drive past you and you hear it
chemical energy
energy that is stored in the chemical compstion of matter
Ex. when wood burns
thermal energy
total amount of energy from the movment of particals
Ex. boiling water on a stove
electromagnetic energy
transmited through space in the form of electromagnetic waves
Ex. microwave cooking food
nuclear energy
large amount of energy in the nucleus holds the nuclear partcails together
Ex. the sun
kinetic energy
objects mass and speed at which the object is moving
Ex. if you held a bowling ball in one hand and a soccer ball in the other than you could feel that the bowling ball has more mass
potential energy
energy that an objects has due to its postion or chemical compstion
Ex. earths gravity
3.3 technology improves the ways people use energy
efficient lights
Ex. LEDs-light emiting doide
efficinet cars
Ex. electric hundi
solar cells
several layers of light senstive materials
Ex. hand held calulators
3.2 energy can change forms but its never lost
law of conservation of energy
state that energy can neither be created nor destroyed
Ex. when ball is kicked
energy efficiency
measurment of usable energy after an energy after an energy conversion
Ex. energy efficient house appliances