Types of Energy
What is the units for measuring energy?
Joules
When a substance is cooled it usually expands. True or False
False
an object that attracts iron and other materials that have magnetic qualities similar to iron
magnet
the transfer of an object by a force that makes an object move in the direction of the force
Work
Most materials ____ when they are heated.
expand
When there is friction between surfaces, energy is transferred out of a system as ________ energy.
thermal
When you move your hand or foot, your body has converted potential energy into
kinetic energy
the invisible region around a charged object where an electric force is applied
Electric Field
a complete circuit through which electricity flows
closed circuit
When coasting while roller skating, you eventually stop due to
friction
Kinetic energy is the energy of
motion
The Law of Conservation of Energy states that
energy cannot be created or destroyed, but can be changed from one form to another.
the transfer of charged particles between two conductor
conductor
stored energy due to the interaction of objects in the gravitational field
Gravitational Potential Energy
When a pot of water is put on a stove, the water at the surface gets hot primarily by ____.
convection
The potential energy of an object depends on its ________ and ________.
mass and height
Which best describes the changes in energy as a child goes down a slide?
potential energy decreases and kinetic energy increases
What is the potential energy between two points in a circuit?
voltage
energy stored in objects that are compressed or stretched, such as springs and rubber bands
Elastic Potential Energy
After braking, a bicycle's tires increase in temperature as friction causes some of the mechanical energy to transfer to
thermal energy
Stored energy is called
potential energy
The combined total of the kinetic and potential energy in a system is called _____.
mechanical energy
What single interaction are electric and magnetic forces a part of?
electromagnet
a material in which electrons cannot easily move
electric insulator
You grab a bottle of water out of the refrigerator. Your hand gets cold because of?
conduction