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8th Grade Science #3
Texas TAKS review for 8th Grade Science-chemical Reactions
| Question | Answer |
|---|---|
| product | substance that forms as the result of a chemical reaction |
| reactant + reactant yields | product |
| reactant | a substance that exists before a chemical reaction takes place |
| What are the reactants when the product carbon dioxide is formed? | carbon and oxygen |
| chemical change | one or more substances are changed into NEW substances with new properties |
| What kind of change cannot be reversed by physical means? | chemical |
| Baking a cake is what kind of change? | chemical |
| chemical equation | a way of describing a chemical reaction using chemical formulas and symbols |
| chemical formula | a way of describing a substance using chemical symbols and numbers |
| chemical formula for water? | H20 |