Particulate polluting of the environment is often a mix of solid and liquid particles which are suspended up that you breathe. It is best to classify air particles from the aerodynamic properties as these properties determine the removal of them through the air, and where they deposit within your breathing. 2. How aggressive they are William with his fantastic friend Jason bring their bicycles to the attic, shrink themselves, and go on a journey. They meet Sir Simon because he is getting ready to leave for a tournament, and they stay at his castle. They spend more time a boy along with a girl at the castle and together. The girl tells them associated with an omen her grandmother, Calendar, kept repeating before she died. Sir Simon sent Calendar away towards the convent as they thought she was crazy and that he doesn't believe the omen. Few accept is as true but Calendar's granddaughter does. Jason and William trust it too.