8th grade Chemistry
Quiz yourself by guessing what should be in
each of the black rectangles below before clicking
on it to display the answer.
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| Flap 2 |
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| Substance |
A number written below and to the right of a chemical symbol in a formula |
| Double Replacement |
when ions in two compounds switch places |
| Activation Energy |
is the minimum amount of energy required for substances to react |
| Chemical Reaction |
process by which one or more substances undergo change to produce one or more new substances. |
| The Law of Conservation of Mass |
states that mass cannot be created or destroyed in ordinary chemical or physical changes. |
| Decompostion |
a single compound breaks down to form tow or more simpler substances. |
| Exothermic |
energy is released. |
| Endothermic |
energy is absorbed. |
| Synthesis |
two or more substances combine to form a single compound. |
| Chemical Formula |
descibes a substance using chemical symbols and numbers. |
| Coefficient |
a number written to the left of a chemical symbol or formula. |
| Single Replacement |
one element replaces another that is part of a compound. (Loner) |
| Chemical Equation |
is a shorthand description of a chemical reaction. |
| Reactent |
the starting material. |
| Product |
the new substance formed. |
| Catlyist |
speeds up a reation. |
| Inhibitor |
slows down a reation. |
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