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# Chapter 4&5 science test

preparing for formulas, vocab, examples of conversion, different energies, and etc.

AB
workthe action that results when a force causes an object to move in the direction of the force
joulethe unit to express work and energy; equivalent to the newton-meter
powerthe rate at which work is done
wattthe unit used to express power; equivalent to joules per second
energythe ability to do work
kinetic energythe energy of motion; depends on speed and mass
potential energythe energy of posistion or shape
mechanical energytotal energy of motion an posistion of an object
energy conversiona change from one type of energy to another
frictiona force that opposes motion between two surfaces that are touching.
law of conservation of energythe law that states that energy is neither created nor destroyed
energy resourcea natural that can be converted by humans into other forms of energy in order to do useful work
nonrenewable resourcea natural resource that cannot be replaced or that can be replaced only over thousands or millions of years
renewable resourcea natural resource that can be used and replaced over a relitively short time
fossil fuelsnonrenewable energy resources that form in the Earth's crust over millions of years from the buried remains of once-living organisms
Formula for workWork (W)= Force (F) / Distance (d)
Formula for powerPower (P)= Work (W) / Time (t)
Formula for kinetic energyKinetic Energy (KE) = mass(volume)2 m(v)2 / 2
Formula for gravitational potential energyGravitational Potential Energy (GPE)= weight(height) w(h)
Formula for mechanical energyMechanical Energy (ME)= potential energy (PE) + kinetic energy (KE)

 Courtney Lindstrom