Give three examples of a PHYSICAL change in matter.
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What are the two main effects that cause matter to change STATE?
Heating and cooling.
Give two examples of a CHEMICAL change in matter.
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Give two SIGNS that a chemical change in matter has occured.
Change in color, change in odor, difficult to reverse, input or release of energy, production of new gases or vapors.
What is this? How does it form?
Rust. Iron oxidizes (reacts to oxygen in the air).
On a summer day, a puddle quickly disappears. What happened to the water?
It evaporated.
What's it called when gas changes to liquid? Give one example.
Condensation. Clouds, dew, fogged mirrors, "sweating" drinks, etc.
What's it called when solid changes to gas? Give one example.
Sublimation: dry ice.
What are the three STATES of matter?
Solid, liquid, gas. (also: plasma)
In which STATE of matter do PARTICLES move the fastest? Is it easier or more difficult for particles to form BONDS when they're moving quickly?
Gas; harder.
