Heat and the Particle Model Solid Liquid Gas Particles are closely packed Particles can slip past each Particles have lots of space together other between them The Effect of Heat on Particles When heat is added to a substance, the particles move faster. When heat is lost from a substance the particles move slower.
They run Apple's iOS mobile operating system. The first generation iPhone was released on June 29, 2007; the most recent iPhone model is the iPhone 7, which was unveiled at a special event on September 7, 2016. The user interface is built around the device's multi-touch screen, including a virtual keyboard.
Original iPhone -- 2007 â Apple CEO Steve Jobs introduced the iPhone to the world January 9, 2007, at the Macworld conference in San Francisco. It went on sale five months later.