Matter and its Changes- Sept 28 Class

In Monday's lesson we learned the States of Matter, Changes in Matter, Physical Changes, Phase Changes, Chemical Changes, and the Conservation of Matter. Also, we got to watch a youtube video of mythbusters as an example to figure out the chemical and physical changes that occurred.


What is Matter?
-Anything that has mass and occupies space
-Matter can exist in many different states, the most common are:

• Solid, Liquid, Gas
  
• Plasma, Aqueous (dissolves in water), Amorphous
  
  

-Solids: holds one shape and has a definite volume (strong bonds)
-Liquids: can change shape, but has a definite volume (weak bonds)
-Gas: can change shape & volume (no bonds)
-Aqueous: something dissolved in water
-Plasma --> ionization


Changes in Matter
- Matter can undergo many changes
- Nearly all changes can be broken down into 3 categories:

• Physical Changes
  
• Chemical Changes
  
• Nuclear Changes
  

Physical Changes
- Involves changing shape or state of matter (crushing, tearing, etc.)
- No new substances are formed (Eg. Boiling water, cutting wood,
smashing cars)




Phase Changes
- Changing from a solid to a gas can often be confused as a chemical change
- Chemicals remain the same


Chemical Changes
- New substances are formed
- Properties of the matter change

• Conductivity, acidity, color, etc.
• Eg. Iron rusting, burning wood, digested food

Physical change of water into hydrogen peroxide


Conservation of Matter
- In Physical and Chemical Changes, matter is neither created nor destroyed.

This is the link of the video we watched of mythbusters:
http://www.youtube.com/watch?v=MWJU6sbf8Ng