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→Key Stage 4
*[[Radiation|By radiation]] - By [[Light]] [[wave]]s or [[Sound]] [[wave]]s.
*[[Heating|By heating]] - By [[Thermal Conduction|conduction]], [[convection]] or [[Thermal Radiation|radiation]].
===Real World Energy Transfers===
When describing the '''energy transfers''' in a [[system]] the initial [[Energy Store|energy store]] and final [[Energy Store|energy store]] are stated.
''NB: It is important to note which [[object]] has the [[Energy Store|energy store]]. It is not enough to say a "[[Thermal Energy Store]]", it must be a "[[Thermal Energy Store]] of the [[object]]".''
====Going Up====
: When an [[object]] travels upwards the [[Gravitational Potential Energy Store|gravitational potential energy store]] increases.
The following are examples of '''energy transfers''' into the [[Gravitational Potential Energy Store|gravitational potential energy store]]:
*A ball starts in motion but comes to rest at its maximum height.
''[[Kinetic Energy Store]] of the ball → [[Gravitational Potential Energy Store]] of the ball.''
*A bullet is fired upwards and comes to rest at its maximum height.
''[[Chemical Potential Energy Store]] of the gunpowder → [[Gravitational Potential Store]] of the bullet.''
*An [[arrow]] is fired upwards and comes to rest at its maximum height.
''[[Elastic Potential Energy Store]] of the bow → [[Gravitational Potential Energy Store]] of the arrow.''
===Examples===
The high [[temperature]] causes the [[Electrical Bulb|bulb]] to glow, [[emit]]ting [[Visible Light]]. This [[Visible Light]] '''transfers energy by radiation''' to the surroundings.
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