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1.2 Investigating Matter Notes There are 2 types of changes in matter: Chemical Change A chemical change is a _____________________ change in matter that occurs when _____________ combine to form ______________ substances. We say a _____________________________ has been formed because the ___________________ are rearranged into different __________________________. - Both ______________________ and _________________________ properties are changed - Changes ___________________ be reversed Clues that a chemical change might have occurred: 1 ______________ change 2 ______________ produced 3 _____________________________ energy given off 4 Changes are not easily _________________________ ** Remember these are only clues that a Chemical Change may have occurred Examples of chemical changes? Physical Change In a physical change, no ________________________________ are created. The ______________ do not rearrange. Physical Changes involve changes in ____________________, ______________________, or _____________. - No __________________ produced by the substance - Physical changes are generally _____________________________ Examples of Physical Changes include: Properties of Matter Properties, or more properly, _________________ of matter are characteristics of matter that can be ________________ or ________________. Characteristics that can be observed are called __________________ properties. Characteristics that can be measured are called __________________ properties. The set of properties that a particular substance has is unique. No other substance has that same set of properties. Thus, unknown substances can be identified by the set of properties they have. Some properties include: Qualitative State Colour Malleability Ductility Crystal Structure Magnetism Quantitative Solubility Conductivity Viscosity Melting/Freezing Point Boiling/Condensing Point 1.2 Notes Continued: Investigating Matter Text pages: 16 – 27 Matter = anything that has ________________ and ___________________ Kinetic Energy = ________________________________ KINETIC MOLECULAR THEORY Explains what happens to matter as the _____________________ of the particles _________________ or ___________________ _________________________________ Four main points to the KMT: 1 All matter is made up of very small _________________________ 2 There is __________________ between the _______________________ 3 The particles are constantly _______________________________ Solids – particles are packed __________________ and ____________________ - hold a definite ______________________ Liquids – particles can ______________________________ past each other - can’t hold a ___________________________ so a liquid takes the shape of the _______________________ Gases – particles have large ____________________ between them - particles are moving quickly in all _____________________ and spread out to fill the container See page 19 figure 1.8 A, B, C