1.1 Changes in energy stores Flashcards
Def of thermal energy
The energy a substance has because of its temperature
Def of gravitational potential
The energy of an object at height
Def of chemical energy
The energy stored in chemical bonds such as those between molecules
Def of elastic potential energy
The energy stored when an object is stretched or squashed
Def of kinetic energy
The energy of a moving object
Def of energy
capacity to do work
Example of chemical
Food, muscles
Example of kinetic
cars, buses
Example of internal/thermal energy
Hot coffee, liquid in a pan
Example of elastic potential
Compressed string, stretched rubber band
Example of gravitational potential
Aero planes, kites
How is energy transferred
Heating, waves, electric current, force when it moves an object
What happens when an object falls
It gains speed, its store of gravitational potential energy decreases and its kinetic energy store increases
What happens to a falling object when it hits the ground
kinetic energy store decreases, energy is transferred to the surroundings, thermal energy store of the surroundings increases
Def of work
When energy is transferred from one type to another
