Static electricity When materials like silk or polythene become charged with static electricity it is because they are poor conductors or insulators and the electrons stay on the surface. Good conductors like metals allow the electrons to flow away. When the charge builds up it can jump across a gap causing a spark. Static electricity happens in clouds because ice particles rub past each other and build up a charge in the cloud and this …showed first 75 words of 4898 total…

…showed last 75 words of 4898 total…Skull<Tab/>A set of bones that form a protective dome around the brain with an articulated (swinging) hinge joint at the jaw. Sternum<Tab/>A plate of bone at the front of the chest. Tendon<Tab/>Attaches a muscle to a bone at a particular point. Vertebral column<Tab/>The flexible backbone (spine) that protects the spinal nerve.