The types of chemical changes that are discussed here include combination and decomposition. Combination happens when two or more substances combine together in a chemical reaction to form one or more different substances. Combination reactions can result in the corrosion of metals like iron with oxygen from the air. Combustion reactions, such as a burning candle, are also examples of the chemical change through the combination of wax and oxygen in a reaction that produces heat, light, carbon dioxide and water.
When running iOS 7 or iOS 8, all iPhone models use Helvetica Ultra Light or Helvetica Light. Finally, when running iOS 9, all iPhone models use a font that is fairly similar to Helvetica, but that Apple calls San Francisco and that is shared by the Apple Watch. iPod models released prior to the iPhone use either Chicago, Espy Sans, or Myriad and use Helvetica after the release of the iPhone.
Use Keyboard. Another easy way to make your text bold in Microsoft Word is with the keyboard. To make text bold by using the keyboard, do the following. 1  Highlight the text you want to make bold. 2  Hold down the Ctrl key on your keyboard. 3  Keep the Ctrl key held down.4  Press the letter B on your keyboard. 5  To switch off the bold text, keep the Ctrl key held down and press the B key again. Highlight the text you want to make bold. 2  Hold down the Ctrl key on your keyboard. 3  Keep the Ctrl key held down. 4  Press the letter B on your keyboard. 5  To switch off the bold text, keep the Ctrl key held down and press the B key again.