Matter and Chemical Change

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Presentation transcript:

Matter and Chemical Change Unit B Matter and Chemical Change

1.1 Safety in the Science Class You must know all of these rules, techniques and procedures in order to participate in any of the Lab Activities. (See page 95 in textbook)

WHMIS Symbols pg. 95 Compressed Gas Dangerously Reactive Poisonous Oxidizing Flammable Corrosive Toxic Biohazardous

Safety Hazard Symbols pg. 94 Caution Warning Danger

1.2 Organizing Matter pg. 97 Draw the diagram illustrated on page 97

Terms Melting- a change from solid to liquid. Evaporation- a change from liquid to gas. Condensation- a change from gas to liquid. Freezing- a change from liquid to solid. Sublimation- a change from solid to gas. Deposition- a change from gas to solid.

Properties of Matter Properties- characteristics that can be used to describe a substance. These can be either Physical or Chemical. Physical Properties: 1. Color 2. Lustre 3. Melting Point 4. Boiling Point 5. Hardness 6. Malleability 7. Ductility 8. Crystal Shape 9. Solubility 10.Density 11. Conductivity Physical Change- the substances appearance or state may be altered, but its composition remains the same. Examples??

Properties of Matter Chemical change- always results in the formation of a different substance, which has its own unique ‘different’ physical properties. Examples?? Describes how substances interact with other substances. Chemical Properties: Reaction with acids Ability to burn Reaction with water Behavior in air Reaction to heat

Pure Substance or Mixture?

Classifying Matter (fill in chart) Pure Substances Mixtures Elements Compounds Heterogeneous Homogeneous Mechanical Solutions Suspensions Colloids

1.3 Observing Changes in Matter Matter can change from one form to another, or create new materials. A physical change occurs when a material changes state. A chemical change occurs when two or more substances react and create a new substance. Evidence that a chemical change has occurred includes: 1. Change in colour 2. Change in odour 3. Formation of a gas 4. Release or absorption of energy (heat)