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==Key Stage 5==
===Meaning===
The '''gravitational interaction''' is the mechanism by which all [[particle]]s with [[mass]] affect one another.
===About The Gravitational Interaction at Subatomic Scales===
: The '''gravitational interaction''' is one of the 4 [[Fundamental Interactions|fundamental interactions]] governing how [[particle]]s affect one another.
: The '''gravitational interaction''' causes all [[particle]]s with [[mass]] to be [[attract]]ed to one another.
: The '''gravitational interaction''' is extremely weak on the scale of [[Relative Atomic Mass|atomic masses]] but is 'long range' and cannot be shielded, so accumulates with large numbers of [[atom]]s to be observable at macroscopic scales.
: The '''gravitational interaction''' may be mediated by an, as yet, undiscovered [[Fundamental Particle|fundamental particle]] called a [[graviton]].
===About The Gravitational Interaction at Macroscopic Scales===
: Due to its long range and the inability to shield the '''gravitational interaction''' it is responsible for the large scale structure of the [[Observable Universe|observable universe]].
{| border="1" style="border-collapse:collapse"
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|[[File:GravitationalForceGraph.png|center|400px]]
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| style="height:20px; width:600px; text-align:center;" |This [[graph]] shows the strength of the [[force]] between two [[object]]s with [[mass]]. The '''gravitational interaction''' between [[mass]]es is [[attract]]ive at a range of 0 to ∞. The strength of the [[force]] reduces [[proportional]] to 1/r<sup>2</sup> where r is the distance between the [[Centre of Mass|centre of mass]] of each [[object]].
|}
===Extra Information===
{{#ev:youtube|https://www.youtube.com/watch?v=YlxKh4oCKhw}}