Energy in Science

• Energy is the ability to do work
• Kinetic energy (KE) - energy possessed by moving objects due to their motion
• Potential energy (PE) - stored energy due to an object's position, shape, or chemical composition
• A flowing stream of water is an example of

  kinetic energy
• An old clock arm swings, a and c are the highest points on the left and right. What happens to the energy as it swings down? Potential energy transfers to kinetic energy.
• A bike is rolling up a hill. At what point is the energy transformed to potential energy?

  When it is rolling up
• A bike is rolling down a hill to a valley. At what point is the energy transformed from gravitational to kinetic energy?

  When it is rolling down
• When a rubber band is stretched it contains?

  potential energy
• When a rubber band that was stretched is released and snapped back it contains?

  Kinetic Energy
• What is the resulting force? 3n to the left and 4n to the right

  1N to the right
• Chemical to mechanical energy transformations occur in a battery in a toy car, and car moving.
• Turning a key on the side of a toy and making the toy move, the motion is produced by?

  mechanical energy transformed into mechanical energy
• The burning match involves the transformation of?

  chemical to light and heat energy
• The matches in the matchbook contain?

  potential chemical energy
• Because of friction, some energy during a transfer is always converted to thermal energy
• The law of conservation of energy says that?

  Energy cannot be created or destroyed, only transferred or transformed.
• When fossil fuels are burned, chemical energy turns into thermal and radiant
• Lightning, static shock and household AC current are all results of?

  electrons moving
• Photosynthesis converts, radiant energy from the sun to chemical energy stored in plants
• In a car engine, thermal energy (from burning gasoline) is converted to mechanical energy
• What's not an example of potential energy?

  flowing river
• Ariana pushes Jaylynn, what could happen?

  both speed and direction will change
• Movement of energy from one place to another?

  energy transfer
• The combination of all the kinetic and potential energy and object has is mechanical energy
• When does a rocket have the highest potential energy?

  When it is just about to start coming down
• What is an example of kinetic energy transforming to gravitational potential energy in rollercoaster terms?

  A rollercoaster comes down from the highest ramp
• When does kinetic energy increase?

  Both mass and velocity increases
• What do forces have?

  Magnitude and Direction
• Magnitude is?

  amount or strength of the force
• Force is measured in what?


  Newtons
• What are the Forms of Energy?

  Mechanical, Thermal, Chemical, Radiant/Light (Electromagnetic), Electrical, Sound, Nuclear
• What is Mechanical Energy?

  Energy of motion or position - the sum of its potential energy and kinetic energy
• What is Heat/Thermal Energy?

  The internal motion of an object (atoms and molecules)
• What is Chemical Energy?

  Energy contained in chemical bonds in an object
• What is Electromagnetic (Radiant) Energy?

  Energy that travels in waves
• What is Electrical Energy?

  Flow of electrons
• What is Sound Energy?

  Energy created by vibrations
• What is Nuclear Energy?

  Energy stored in center (nucleus) of an atom
• What is Law of Conservation of Energy?

  Energy cannot be created or destroyed but it's transformed from one form to another.