Why should we study this stuff?

 all objects are made of matter.  Energy can cause matter to change.  Chemistry is the study of how these changes take place and try to find out how different reactions and combinations can be used to make our lives better..

 The development of synthetic or human- made substances such as teflon, plastic, nylon and cellophane (plastic wrap) have improved many aspects of our lives.

 The development of polyvinyl chloride, PVC pipe, has been useful in plumbing supplies, fencing, patios, and eavestroughing.

 The understanding of the chemical breakdown of nutrients in our bodies has led to healthier lifestyles.  The development of antibiotics, the clean combustion of fuel, the innovations in building supplies, and even the non-toxic ingredients used in cleaning supplies are all results of chemistry-based knowledge

 Matter – anything that has mass and takes up space  Pure substances – one in which all the particles that make up a substance are the same ◦ Elements – pure substances that cannot be broken down into simple substances. Identified with a chemical symbol ◦ Compounds – pure substances that contain 2 or more different elements in a fixed proportion, identified with chemical formulas

 Physical properties – for example: states of matter at room temperature, hardness, melting and boiling points, odour, solubility, color  Chemical properties – is a characteristic behaviour that occurs when a substance changes to a new substance. The change itself is called chemical change