Chapter 5 vocabulary
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Physical change | Any change that alters the form or appearance of a substance but does not change it into another substance
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| Chemical change | A change in mstter that produces one or more new substances
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| Reactant | Substance that undergo the chemical changes
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| Product | The new substances that form
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| Precipitate | A solid that firms from a liquids during a chemical reaction
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| Exothermic reaction | A reaction that releases energy
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| Endothermic reaction | A reaction that absorbs energy
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| Chemical equation | A way to show a chemical reaction, using symbols instead of words
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| Law of conservation of mass | The principle that the total amount of matter is neither created nor destroyed during any chemical or physical change
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| Open system | A system in which matter can enter from or escape to the surroundings
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| Closed system | A system in which no matter is allowed to enter or leave
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| Coefficient | A number placed in front of a chemical formula in an equation
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| Synthesis | When two or more elements or compounds combine to make a more complex substance
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| Decomposition | A chemical reaction that breaks down compounds into simpler products
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| Replacement | When one element replaces another element Ina compound, or if two elements in different compounds trade places
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| Activation energy | The minimum amount of energy needed to start a chemical reaction
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| Concentration | The amount of a substance in a given volume
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| Catalyst | A material that increases the rate of a reaction by lowering the activation energy
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| Enzyme | The cells in your body contain thousands of biological catalysts
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| Inhibitor | A material used to decrease the rate of a chemical reation
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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