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Physical vs. Chemical Change

Physical vs. Chemical Change. How do you know which is which?. Distinguish between physical & chemical change. In the following clip; what evidence is there of a chemical change?. http://www.youtube.com/watch?v= GYy9B6vnCtI. Physical vs Chemical Change.

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Physical vs. Chemical Change

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  1. Physical vs. Chemical Change How do you know which is which?

  2. Distinguish between physical & chemical change.

  3. In the following clip; what evidence is there of a chemical change? • http://www.youtube.com/watch?v=GYy9B6vnCtI

  4. Physical vs Chemical Change

  5. Watch the videos examples & decide if they show a physical or chemical change. • Gummy bear: • http://www.youtube.com/watch?v=MUensqImzXM&feature=related • Onion chopping: • http://www.youtube.com/watch?v=aDjNl5gs4nM • Rust formation: • http://www.youtube.com/watch?v=qsd-izmwvs8 • Boiling water: • http://www.youtube.com/watch?v=hsWZ0sLubXU • Bromine and alcohol: • http://www.youtube.com/watch?v=hVK9Om4wzBM&feature=related • Justin Bieber: • http://www.youtube.com/watch?v=b3Liczyvu78

  6. Your Exit Ticket Use your own sheet of paper (A half-sheet will do). • Which process is an example of a chemical change? • Salt dissolves in water • A nail rusts • Ice melts • A glass breaks • Which process is an example of a physicalchange? • Calcite bubbles when it comes into contact with acid • An egg is fried in a pan • Water boils into steam • A piece of wood burns into charcoal • Hydrochloric acid is added to a beaker containing a piece of zinc. As are result, zinc chloride is formed & hydrogen gas is released. What evidence is there that this is a chemical change?

  7. Place your exit ticket in the basket on your way out of class!Have a great day!

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