Bellringer Identify the changes as PHYSICAL (P) OR CHEMCIAL (C) in the BEFORE column
Learning Target… I can distinguish between a physical and chemical change. This means I know what physical changes and chemical changes are and I can tell the difference between them.
Characteristics of Physical Changes A change in physical properties Change the form or appearance of the substance A new substance is NOT formed You can often reverse it
Examples of Physical Changes Cutting Change in shape Dissolving Consider dissolving sugar in lemonade, though you can no longer see the sugar, you know it hasn’t changed because you can still taste it!
Examples of Physical Change Any change in state Melting: solid to liquid Boiling: liquid to gas Condensation: gas to liquid Freezing: liquid to solid Sublimation: solid to gas Deposition: gas to solid
Changes of State Matter is made up of moving particles The state of matter is determined by how much energy the particles have Draw a picture of what the particles look like in a solid, liquid, and gas.
Changes of State Solids Liquids Gas Particles are close together and only vibrate Liquids Particles move faster and slide past each other Gas Particles move quickly and far apart
Changes of State Particles of matter move faster or slow down as temperature changes and so the state changes!
More about state changes…. BrainPop
Illustrating Physical Changes Let’s illustrate some physical changes! Consider what the particles are doing during the change! First, let’s do one together! Cutting paper Melting ice Evaporating water Mixing salt and water Molding playdough