science Y8 T4 Flashcards
define kinetic energy
Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force.
define heat energy
Heat is the form of energy that is transferred between two substances at different temperatures
define light energy
Light energy is a kind of kinetic energy with the ability to make types of light visible to human eyes
define sound energy
Sound energy is the energy that we create when sound waves move outward from a vibrating article or sound source.
define electrical energy
Electricity is the flow of electrical power or charge.
define potential energy
Potential energy is the stored energy in an object due to its position, properties, and forces acting on it.
define gravitational potential energy
Gravitational potential energy is the energy an object has due to its position above Earth, energy due to its height
define chemical energy
Chemical energy is defined as. the energy which is stored in the bonds of chemical compounds (molecules and atoms).
define elastic potential energy
Elastic potential energy is energy stored as a result of applying a force to deform an elastic object. The energy is stored until the force is removed and the object springs back to its original shape,
define nuclear energy
Nuclear energy is a form of energy released from the nucleus, the core of atoms, made up of protons and neutrons.
Distinguish between gravitational, chemical and elastic potential energy.
Gravitational potential energy is the energy an object has due to its position in a gravitational field, like a book on a shelf. Chemical potential energy is stored in the bonds of chemical compounds, such as food or gasoline, and is released during chemical reactions. Elastic potential energy is found in objects that can be stretched or compressed, like springs or rubber bands
identify bodies that possess kinetic energy because of their motion.
Kinetic energy is energy possessed by an object in motion. The earth revolving around the sun, you walking down the street, and molecules moving in space all have kinetic energy.
distinguish different types of kinetic energy
There are five main types of kinetic energy: radiant, thermal, sound, electrical, and mechanical.
distinguish between kinetic and potential energy
Potential energy is energy stored in an object due to its position or arrangement. Kinetic energy is energy of an object due to its movement - its motion.
how to identify whether an object has potential or kinetic energy.
Potential energy is position relative. In other words, it changes depending on an object’s height or distance and the mass of the object. Kinetic energy changes depending on an object’s speed and its mass.
