Changes In Matter

Dear Kalpita,

Strangely enough i have a harder time remembering the simple stuff than i do with the Bosons and Fermions. Oh well. Moving right along....

A Physhical Change in Matter is when something changes it's shape without becoming a new object.
Examples of these are:

• Change of state (such as from solid to liquid or from gas to liquid)
  
  • Specific examples of state change include water freezing, alcohol evaporating and dry ice (solid carbon dioxide) subliming
• Absorption of water
• Crumpling
• Pulling copper into a thin wire - a change of shape, but not a change of composition
• Cutting a material
• Tearing
• Breaking
• Deflating
• Mixing different solids (such as solid sulfur and iron filings)
• Inflating
• Cloud forming in the sky

Chemical Changes are when the composition of an object changes.

Examples of this are:

• Burning a log of wood
• Mixing an acid with a base, producing water and a salt.
• Photosynthesis - a process in which carbon dioxide and water are changed into sugars by plants.
• Cracking heavy hydrocarbons to create lighter hydrocarbons (part of the process of refining oil).
• Cooking examples: popcorn, cake, pancakes, and eggs
• Oxidation examples: rust or tarnishing
• Combustion
• Mixing chemicals
• Rotting of fruit
• Cooking rice
• Explosions
• Tarnishing silver
• Lighting a match
• Chewing/digesting food
• Rusting
• Burning gas in a stove
• Oxidizing food for energy
• Roasting a marshmallow
• Adding food coloring to icing
• Frying
• Burning a magnesium strip

The Three PRINCIPLE states of matter are:
Liquid
Solid
Gas
If you read my blog you also know about Bose-Einstein Condensat (superfluids ,superconductors and Rubidium/) and Plasma(lightning)

Fun Fact: Water is the same substance no matter what state it is in. That's why the Science Channel often refers to water on Earth as Liquid Water instead of just plain Water.

Another name for a Chemical change is a Positive Change

I have been asked to decide whether some things are a chemical or a physical change
Iron Rusting outside- ooh ooh! I know this one! Chemical
Wood is chopped in half- Physical
Gasoline burning in an engine- Chemical
Ice melting into liquid water- Like I said before. Physical


I have just completed that assignment . Whoo!