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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 |