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Exothermic and Endothermic Reactions
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Endothermic: absorbs heat energy from the surroundings.
Exothermic: releases heat energy to the surroundings.
photosynthesis: a reaction in plants that produces sugar from carbon dioxide, water and solar energy.
Physical change: the matter changes only in size, shape or appearance.
Products: the new substances in a chemical reaction.
Reactants: substances that change in a chemical reaction.
States of matter: solid, liquid, gas.
Fuels: substances able to burn, source of energy.
Explosion: rapid and extreme release of energy.
Bond: the electrical attractive force between the atoms
Matter: anything that has mass and takes up space.
Chemical change: a change in matter that produces one or more new substances.
Precipitate: a solid that forms from solution during a chemical reaction.
Exothermic and Endothermic Reactions
Across:1. | a solid that forms from solution during a chemical reaction. | 4. | releases heat energy to the surroundings. | 7. | the matter changes only in size, shape or appearance. | 8. | solid, liquid, gas. | 9. | substances able to burn, source of energy. | 10. | rapid and extreme release of energy. | 11. | anything that has mass and takes up space. |
| | Down:1. | a reaction in plants that produces sugar from carbon dioxide, water and solar energy. | 2. | absorbs heat energy from the surroundings. | 3. | a change in matter that produces one or more new substances. | 5. | the electrical attractive force between the atoms | 6. | substances that change in a chemical reaction. | 7. | the new substances in a chemical reaction. |
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© 2013
PuzzleFast.com, Noncommercial Use Only
Exothermic and Endothermic Reactions
Across:1. | a solid that forms from solution during a chemical reaction. | 4. | releases heat energy to the surroundings. | 7. | the matter changes only in size, shape or appearance. | 8. | solid, liquid, gas. | 9. | substances able to burn, source of energy. | 10. | rapid and extreme release of energy. | 11. | anything that has mass and takes up space. |
| | Down:1. | a reaction in plants that produces sugar from carbon dioxide, water and solar energy. | 2. | absorbs heat energy from the surroundings. | 3. | a change in matter that produces one or more new substances. | 5. | the electrical attractive force between the atoms | 6. | substances that change in a chemical reaction. | 7. | the new substances in a chemical reaction. |
| |
© 2013
PuzzleFast.com, Noncommercial Use Only