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7E Word Sheets
Science 7
Question | Answer |
---|---|
acetic acid | The old name for ethanoic acid. It is the acid in vinegar. |
acid | A substance that turns litmus red. It has a pH of less than 7. |
ascorbic acid | Chemical name for vitamin C. |
citric acid | The acid in citrus fruits. |
ethanoic acid | The acid in vinegar. |
gas | Something made of particles that are very spread out and have no bonds between them. |
sweetener | A substance that makes things taste sweeter. |
corrosive | Substances that attack metals, stonework and skin. |
harmful | Another word for irritant. |
hydrochloric acid | A common acid that is also found in your stomach. |
irritant | Something that irritates the skin and eyes. |
nitric acid | A common acid. |
sulphuric acid | A common acid - used in car batteries. |
alkali | Substance that turns litmus blue. Has a pH of more than 7. |
indicator | A dye that will change colour in acids and alkalis. |
litmus | A simple kind of indicator. It turns red in acids and blue in alkalis. |
neutral | Substance that is not an acid or an alkali. Has a pH of 7. |
antacid | A medicine containing an alkali used to cancel out some of the acid in the stomach to treat heartburn. |
pH scale | A numbered scale form 1-14 showing the strengths of acids and alkalis. |
universal indicator | A mixture of indicators giving a different colour depending on how weak or strong an acid or alkali is. |
burette | A tube with a tap at the bottom and a measuring scale on its side. Used to add a measured quantity of a liquid to another one. |
dilute | We dilute a solution by adding more of the solvent to it. |
neutralisation | When something is neutralised. |
neutralise | When an acid is added to a base (or alkali) a neutral substance is produced. |