Infrastructure as a Service (IaaS) is a form of cloud computing that provides virtualized computing resources over the Internet. IaaS is one of three main categories of cloud computing services, alongside Software as a Service (SaaS) and Platform as a Service (PaaS). Download: Your guide to the Public Cloud.
02. 1  of 09. Rocks Vocabulary Study Sheet. 2  03. of 09. Rocks Vocabulary. 3  04. of 09. Rocks Word Search. 4  05. of 09. Rocks Crossword Puzzle. 5  06. of 09. Rocks Challenge Worksheet. 6  07. of 09. Rocks Alphabet Activity. 7  08. of 09. Rocks Spelling Worksheet. 8  09. of 09. Rocks Coloring Page.
The three main types, or classes, of rock are sedimentary, metamorphic, and igneous and the differences among them have to do with how they are formed. Sedimentary. Sedimentary rocks are formed from particles of sand, shells, pebbles, and other fragments of material.Together, all these particles are called sediment. Gradually, the sediment accumulates in layers and over a long period of time hardens into rock.edimentary. Sedimentary rocks are formed from particles of sand, shells, pebbles, and other fragments of material. Together, all these particles are called sediment. Gradually, the sediment accumulates in layers and over a long period of time hardens into rock.