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Matter (Changes)
Chemical and Physical Changes
Question | Answer |
---|---|
Matter always stays the same. | False |
A physical change is a change in size, shape or phase of matter, without the matter changing chemically. | True |
In a physical change, matter cannot change its shape. | False |
The ability to burn is a chemical property called “flammability.” | Truse |
A chemical change is a process by which a certain substance becomes a different substance. | True |
In a chemical change, the same substance is formed. | False |
Chemical changes occur at the same speeds. | False |
Photosynthesis is an important chemical reaction on earth. | True |
Chemical reactions occur when two or more substances combine to form a new substance. | True |