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Contact explosive
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<p>A contact explosive is a <a href="/facts/Chemical_substance/EWcXU41d">chemical substance</a> that <a href="/facts/Explode/Utp8Wv9D">explodes</a> violently when it is exposed to a relatively small amount of <a href="/facts/Energy/wd8PrQM7">energy</a> (e.g. <a href="/facts/Friction/d0108Rpu">friction</a>, <a href="/facts/Pressure/eyc37GRG">pressure</a>, <a href="/facts/Sound/DlKXlPuF">sound</a>, <a href="/facts/Light/jeofpMn4">light</a>). Though different contact explosives have varying amounts of <a href="/facts/Sensitivity_(explosives)/NQb9DTPh">energy sensitivity</a>, they are all much more sensitive relative to other kinds of explosives. Contact explosives are a part of a group of explosives called <a href="/facts/Primary_explosives/sUme5Pp8">primary explosives</a>, which are also very sensitive to stimuli but not to the degree of contact explosives. The extreme sensitivity of contact explosives is due to either <a href="/facts/Chemical_composition/vjo4uMQ0">chemical composition</a>, <a href="/facts/Chemical_bond/ArNUMnIB">bond</a> type, or <a href="/facts/Chemical_structure/r5rT1Lj4">structure</a>. </p>