INSC 310 – TOPIC #4 (Properties of Matter – Part II)

BAKING SODA AND VINEGAR 

Scientific Principles:

  • Chemical Reaction: a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction

1.) What was the point of this activity?

To demonstrate  chemical reactions and that amounts matter.

2.) Explain how you would introduce this to your class.

By putting baking soda into a balloon and vinegar into a water bottle and recording the reaction.

3.) Where do you see a student having difficulty with this?

I could see a student struggling with measurements because they may not understand the difference.

4.) What changes or extensions could you do to this activity?

I would try using different color baking soda for the amounts so that the students could witness the change for each amount.

 

 

 

POTATO EXPERIMENT

Scientific Principles:

  • Diffusion: the intermingling of substances by the natural movement of their particles
  • Osmosis: a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one, thus equalizing the concentrations on each side of the membrane

1.) What was the point of this activity?

To show if it is more natural for things to mix or separate.

2.) Explain how you would introduce this to your class?

I would introduce this using the same experiment, with maybe a different vegetable, such as a carrot.

3.) Where do you see a student having difficulty with this?

Not understanding why the salt dissolved.

4.) What changes or extensions could you do to this activity?

I would use sugar instead of salt with food coloring.

 

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