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Physical and Chemical Changes of Matter
Terms in this set (27)
when an original substance is changed into a new substance
alteration in size, shape or form of matter
relates an object's mass to the amount of space it takes up
how much space something takes up
conservation of mass
total mass is same before and after a physical or chemical change.
How can you tell when a chemical change has occurred?
when energy is given off or absorbed.
What are some examples of chemical change:
rusting, spoiling, burning,
What are some examples of physical change?
change of form, evaporating,
The ability to burn is an example of what kind of property?
a chemical property
what is a property that could be used to identify either a physical OR chemical change, depending on the cause for the change?
Is Odor a chemical or physical property?
A change in an object's odor is an example of what type of change?
a chemical change
The precipitation of a solid can indicate what type of change?
a chemical change
When a substance undergoes a change and its composition remains the same, what type of change is it?
Is it easy to revert a substance back to its original form after a chemical change?
Both chemical and physical changes may result in a change in
If you tear, cut or grind something, you are causing what type of change?
a physical change
if one substance will dissolve into another
a physical property that identifies whether a substance can conduct heat or electricity
What are some clues to Chemical Changes:
Color change, temperature change, sound production, gas production, odor production, precipitate
when a solid forms out of two liquids
substances you have BEFORE a chemical reaction takes place.
Substances you have AFTER a chemical reaction takes place
Do you use your senses to identify chemical properties of matter?
A sign of chemical change is when energy is:
released or gained.
In a physical change, does a substance have the same chemical composition
both before and after the change
Reactants on their own might not be dangerous but when _____ can be dangerous
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