| A | B |
|---|
| acids | substance that tastes sour, reacts with metals and carbonates, and turns blue litmus paper red |
| corrosive | means that the substance "eats away" at other materials |
| indicator | a compound that changes color when in contact with an acid or a base |
| base | a substance that tastes bitter, feels slippery, and turns red litmus paper blue |
| hydrogen ion (H+) | an atom of hydrogen that has lost its electron make a subdtance acidic |
| hydroxide ion (OH-) | a negative ion made of oxygen and hydrogen with more in basic solutions |
| acid rain | more acidic than normal rainwater |
| neutralization | a reaction between an acid and a base |
| salt | any ionic compound made from the neutralization of an acid with a base |
| mechanical digestion | tears, grinds, and mashes large food particles into smaller ones |
| chemical digestion | breaks large molecules into smaller molecules |
| pH more than 7 | base |
| pH less than 7 | acid |
| pH of 7 | neutral |
