science 4/11

• what can energy do

  move matter and work
• what are the two types of energy

  kinetic and potential
• kinetic energy is ____

  motion
• kinetic energy depends on

  the mass of an object, velocity of an object
• what is the formula for kinetic energy

  1/2 x mass / velocity^2
• potential energy

  energy that is stored in an object due to its conditions or position
• what is PE caused by

  gravity- gravitational potential energy
• gravitational potential energy

  potential energy stored due to gravity
• what does GPE depend on

  gravity, mass, height
• what is the formula for potential energy

  mass x gravity x height
• elastic potential energy

  energy stored in an object that will return to its original state
• what are the forms of energy

  mechanical,thermal,chemical,electrical,electromagnetic,nuclear, sound energy
• energy convesion

  a change from one form of energy to another]
• energy conversions need _____

  movement
• potential energy is

  still
• kinetic energy is ____

  moving
• energy conversation=

  energy transfer
• what Is the law of conservation

  energy cannot be created not detsroyedh
• what is the theory of relativity

  energy can be created by detsroying tiny amounts of matter
• the GPE is often converted into ____


  kinetic energy of motion
• mechanical energy =

  KE + PE
• what is einsetins equation


  e = mc^2
• what are non renewable resources

  exist in limited quantities and once used cant be replaced except over one million years
• what are examples of nonrenewable resources

  oil, natural gas, coal, uranium (fossil fuels)
• where are fossil fuels formed

  under ground
• are the good and bad things about fossial feuls

  good things: readily available, inexpensive

  bad things: created pollution, not much in the u.s
• renewable energy resources

  resources that can be replaced in a relatively short period of time
• where do renewable resources form

  indirectly from the sun
• what are examples of renewable energy sources

  reusable energy, hydroelectric, solar, geo electric, wind, bio mass, nuclear fusion
• what are the good things about hydroelectric energy

  no pollution, low cost to produce
• what are the bad things about hydro electric energy

  dams block water, causes environmental problems
• Ke of hydroeletricy is used to

  turn turbines
• solar energy

  sunlight converted into usable energy - sunlight going through a window
• active solar

  sun heats flat collection platers through which water flows - sun converted into electrical energy with solar cells
• geothermal energy

  thermal energy found in the Earth's surface - does not pollute, created steam and produces electricity
• bio mass energy

  stores in living things, uses wood and corn stocks to create thermal energy