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Sci8/Phys&ChemChange
First 9 Weeks Review
Term | Definition |
---|---|
Physical Change | no new substance is created. The shape, size, or state of matter will change. |
Chemical change | produces a new substance that has different properties from those of the original substance |
Chemical reaction | a process that produces a chemical change |
Rate of reaction | how fast a reaction occurs after it has started |
Catalyst | a substance that SPEEDS up a chemical reaction |
Inhibitor | a substance that SLOWS down a chemical reaction |
Endothermic reaction | absorbs thermal(heat) energy |
Exothermic reaction | releases thermal(heat) energy |
Reactants | substances that exist before the reaction begins. They are found in front of the arrow in an equation |
Products | substances that form as a result of the reaction. They are found behind the arrow in an equation. |
Iron | changes to rust in the presence of Oxygen and Water. |
Combustion | object catches fore with the presence of Oxygen |
Food spoilage |