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===About Gas Pressure===
: '''Pressure in gases''' is caused by particles [[particle]]s [[Collide|colliding]] with the [[object]] or walls of the container.
: Each time a [[particle]] in the [[gas]] hits an [[object]] or the walls it provides a [[force]].
: The more [[particle]]s that hit the [[object]] or walls, the bigger the overall [[force]] it will experience.
| style="height:20px; width:200px; text-align:center;" |Increasing the [[temperature]] of the [[gas]] which makes the [[particle]]s move faster. This causes the particles to hit the walls of the container more often and with a greater [[force]].
| style="height:20px; width:200px; text-align:center;" |Increasing the number of particles in the container.
|}
==Key Stage 3==
===Meaning===
'''Gas pressure''' is the [[pressure]] on an [[object]] caused by a [[gas]].
===About Gas Pressure===
: '''Pressure in gases''' is caused by [[particle]]s [[Collide|colliding]] with the [[object]] or walls of the container.
: The [[pressure]] from a [[gas]] always acts at [[Right Angle|right angles]] to the surface.
: Each time a [[particle]] in the [[gas]] hits an [[object]] or the walls it changes [[momentum]] which causes a [[force]] to be applied to the surface.
: The more [[particle]]s that hit the surface, the bigger the overall [[force]] it will experience.
: The faster the [[particle]]s hit the [[object]] or walls, the bigger the [[force]] that each [[particle]] [[collide]]s with.
: The frequency and [[speed]] with which the [[particle]]s collide with the surface determines the [[pressure]] on that surface.
{| class="wikitable"
|-
|[[File:GasPressure1.png|center|300px]]
|-
| style="height:20px; width:200px; text-align:center;" |The [[Particle Model|particle model]] of a [[gas]] showing the [[particle]]s as red balls and their speed and direction shown by the arrows. The longer the arrows the faster they are moving.
|}
: The '''gas pressure''' can be increased in three ways:
{| class="wikitable"
|-
|[[File:GasPressure3.png|center|300px]]
|[[File:GasPressure2.png|center|300px]]
|-
| style="height:20px; width:200px; text-align:center;" |Increasing the [[temperature]] of the [[gas]] which makes the [[particle]]s move faster. This causes the particles to hit the walls of the container more often and with a greater [[force]].
| style="height:20px; width:200px; text-align:center;" |Increasing the number of [[particle]]s in the container.
|}