physical change
n=3
a: physical change ~
b: a pice of wood
What:
"A physical change is like when you cut a pice of wood. A physical change is when you change the state. A chemical change is when you burn a pice of toast you can not unburn it. A chemical reaction is when you have baking soda and cabage jucie together. "
Writer: Not Stated
LCC:
Where:
Date: Feb 20 2014 5:33 PM
a: Physical change ~
b: water freezing or melting
What:
Water has 3 states: solid, liquid and vapor. The states can be changed by changing the surrounding temperature and air pressure. When water changes from liquid to solid, it freezes; that is a physical change. The individual water molecules don't react, they change the way they interact with each other.
Writer: Not Stated
LCC:
Where: Reference Link Has Evaporated
Date: Feb 20 2014 5:33 PM
a: Physical change ~
b: hood of a car after a collision
What: When a car hits an object at speed, the hood can be smashed and rumpled by the collision. This is a physical change. When such a collision occurs, the paint on the surface of the hood is often cracked and exposed to air. If the vehicle is allowed to sit in the open for an extended period of time, the exposed metal, assuming that it is steel, will begin to oxidize or rust. The rust formation on the crumpled hood is a chemical change. The oxygen in the air is changing the oxidation state of the steel which changes its appearance.
Writer: Lucretia
LCC:
Where: Reference Link Has Evaporated
Date: Feb 20 2014 5:43 PM
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