7.6.C:  distinguish between physical and chemical changes in matter;

Distinguish

BETWEEN PHYSICAL AND CHEMICAL CHANGES IN MATTER

Including, but not limited to:

• Physical properties – color, texture, odor, conductivity, insulator, magnetic, buoyancy, solubility, boiling and melting point, mass, and luster

• Physical change – change which alters the physical properties of a substance without changing its identity

  • Possible examples of physical changes in matter:

    • Freezing, melting, or boiling water

    • Shredding paper

    • Melting ice cream

    • Breaking glass

    • Dissolving sugar

• Chemical properties – reactivity, flammability, toxicity, and corrosivity 

• Chemical change – a change in matter that produces a new substance

  • Signs of a chemical change:

    • Production of a gas 

      • Odor

      • Bubbling

    • Change in temperature

    • Production of a precipitate

      • Precipitate – the formation of solids from a solution

    • Color change (permanent)

    • Production of light energy

    • Production of sound energy

  • Possible examples of chemical changes in matter:

    • Burning wood

    • Rusting of metal

    • Photosynthesis