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Science Ch3L4
PVA 6th Grade 1/13/21
| Question | Answer |
|---|---|
| An _____ reaction is a chemical reaction that RELEASES energy. | exothermic |
| Energy released during a chemical reaction comes from chemical ______ between atoms. | bonds |
| In an exothermic reaction, the bonds in the reactants contain _______ energy than the bonds in the product. | more |
| When zinc is added to hydrochloric acid, ____ energy is given off. If the zinc and hydrochloric acid are in a test tube, the test tube will become hot. | thermal |
| Burning and _____ are exothermic reactions. | rusting |
| Much of the energy you need to function comes from molecules called ______. | carbohydrates |
| Chemical reactions that ABSORB energy are called _____ reactions. | endothermic |
| Endothermic reactions require a constant supply of _____ for the reaction to continue. | energy |
| In an endothermic reaction, the bonds in the reactants contain ___ energy than the bonds in the product. | less |
| The energy absorbed during the chemical reaction comes from the ____ surrounding the chemicals. | environment |
| The speed at which a chemical reaction occurs is called the ____ of reaction. | rate |
| Increasing the temperature or the concentration of reactants ___ the rate of a chemical reaction. | increases |
| The exposed ___ area of reactant particles also affects the rate of a chemical reaction. The larger the area that is exposed, the ____ the reaction takes place.` | surface faster |
| Increasing temperature causes the ____ in a substance to move fast. This causes particles to collide more often. | particles |
| A substance the speeds up a chemical reaction without being changed in the reaction is called a ______. | catalyst |
| In cars, ___ converters change harmful substances into less harmful substances. | catalytic |
| I am released or absorbed during a chemical reaction. What am I? | energy |
| I am a catalyst that speeds up chemical reactions in your body. What am I? | enzyme |
| I am the type of chemical reaction that absorbs energy? What am I? | exothermic reaction |
| I ama substance that speeds up a chemical reaction. I am not changed or used up during the reaction. What am I? | catalyst |
| I am the speed at which a chemical reaction occurs? What am I? | rate of reaction |
| I am the amount of exposed area of a solid substance. What am I? | surface area |
| I am the type of chemical reaction that releases energy. What am I? | endothermic reaction |
| I am the endothermic reaction that takes place in plants when they absorb sunlight. What am I? | photosynthesis |
| When a chemical bond breaks, energy is _____. | released |
| Energy is _____ when compounds form. | absorbed |
| A ____ occurs when energy is released. | exothermic reaction |
| An example of an is _____. | rusting |
| An ____ occurs when energy is absorbed. | endothermic reaction |
| The ____ or speed of a chemical reaction depends on many factors. | rate |
| The amount of __ of solid reactants is another factor that affects the rate of a chemical reaction. | surface area |
| The __ the area that is exposed, the faster the reaction takes place. | larger |
Created by:
EmmaKate09