Chemistry

Energy

capacity to do work

potential energy

energy of position

kinetic energy

energy of movement

Heat

flow of energy due to a temperature difference

Temperature

measure of average kinetic energy

exothermic

heat is released

endothermic

heat is absorbed

law of conservation of energy

energy is neither created or destroyed

If energy an heat flow into the system the signs are

positve

if energy and heat flow out of the system the sings are

negative

greenhouse effect

when fossil fuels are burn they prove CO2 which leads to warmer temp

energy sources in the USA

fossil fuels, nuclear, hydro,wind,solar,geo

wind : advantage

no pollution and cheap

wind : disadvantage

wind power is less predicable

potential energy example :

water sitting behind a dam

kinetic energy example :

a an swimming in a pool