Wed., March 22nd: Testing Physical Properties and Chemical Beginnings

physical-and-chemical-properties

What are CHEMICAL CHANGES and PROPERTIES?

CHEMICAL PROPERTIES: 

  • Definition (on top of flap)– Properties that can be observed during or after a chemical reaction. The substance is changed to a NEW substance.
  • Examples (under flap)– How easily something catches fire (flammability), decomposition (if something will rot and break down), reactivity with air or water (rust is an example), how toxic it might be.

CHEMICAL CHANGES- 

  • Definition (on top of flap)
    • A substance changes into a new substance with different properties.
    • Substances present at the beginning of the change are NOT present at the end.
    • Can’t or is very difficult to undo!
  • Evidence of a Chemical Change (under flap)- http://www.classzone.com/vpg_ebooks/ml_sci_gr8/accessibility/ml_sci_gr8/page_155.pdf
    • Different signs include
      • an odor is produced
      • light or smoke is seen
      • temperature change- it takes in or gives off heat
      • production of gas bubbles
      • color change (like rusting)

WATCH

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EXAMPLES OF PHYSICAL AND CHEMICAL CHANGES

LET’S PLAY (Use Chrome)

 

 

LAB INFORMATION RESOURCES

Baking Soda

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