Base (n) , a. A substance that feels slippery and can neutralize acids., Acid (n), c. A substance with a sour taste that turns blue litmus paper red., pH scale (n) , A measure of how acidic or alkaline a substance is, ranging from 0 to 14., Indicator (n) , A substance used to show the presence of an acid or base by changing color., Corrosive (adj), d. To cause damage or destroy a surface by a chemical reaction., Irritant (n/adj), f. A substance that causes slight inflammation or other discomfort to the body (especially eyes or skin)..

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