1. Literacy Starter Activities Year 10 C1 Topic 3: Acids Focus: Word choices

2. C1.10 Indigestion Rewrite this, underlining all the nouns: Your stomach produces hydrochloric acid (HCl), which kills bacteria that may be on your food. Food in the stomach is digested (broken down) by digestive enzymes that need acidic conditions to work properly.

3. C1.10 Indigestion Rewrite this, underlining all the nouns: Your stomach produces hydrochloric acid (HCl), which kills bacteria that may be on your food. Food in the stomach is digested (broken down) by digestive enzymes that need acidic conditions to work properly.

4. C1.11 Indigestion remedies Rewrite this, underlining all the verbs: Stomach pains are often caused by indigestion, when the stomach produces too much acid. Indigestion remedies contain substances that neutralise the excess acid in the stomach to make you feel better.

5. C1.11 Indigestion remedies Rewrite this, underlining all the verbs: Stomach pains are often caused by indigestion, when the stomach produces too much acid. Indigestion remedies contain substances that neutralise the excess acid in the stomach to make you feel better.

6. C1.12 Neutralisation Write down what each of these words means: Corrosive, harmful, irritant, flammable, toxic Now compare your answers with a partners. Then check them using a dictionary.

7. C1.13 Electrolysis Look at this text. Write down all the words you don’t know the meaning of, then use a dictionary to look them up and write a definition for each word. Davy was a pioneer in the field of electrolysis using the voltaic pile to split up common compounds and thus prepare many new elements. He went on to electrolyse molten salts and discovered several new metals, especially sodium and potassium, highly reactive elements known as the alkali metals. Before the 18th century, no distinction was made between potassium and sodium. Potassium was the first metal that was isolated by electrolysis. Sodium was first isolated by Davy in the same year by passing an electric current through molten sodium hydroxide. Davy went on to discover calcium, magnesium, boron and barium.

8. C1.14 The importance of chlorine Rewrite this passage, underlining the proper nouns: Chlorine gas was used as a weapon in the First World War (19-14-1918). It dissolves in the moisture in the eyes and lungs to form an acid. Gassed soldiers usually died painfully within a couple of days. This was sometimes depicted in paintings by artists such as John Singer Sargent who painted scenes from battlefields in Europe.

9. C1.14 The importance of chlorine Rewrite this passage, underlining the proper nouns: Chlorine gas was used as a weapon in the First World War (19-14-1918). It dissolves in the moisture in the eyes and lungs to form an acid. Gassed soldiers usually died painfully within a couple of days. This was sometimes depicted in paintings by artists such as John Singer Sargent who painted scenes from battlefields in Europe.

10. C1.15 The electrolysis of water Rewrite this, underlining all the adjectives: You can test an unknown gas to see if it is chlorine by holding a small piece of damp blue litmus paper in the mouth of the tube. If the gas is chlorine the paper will turn red and then turn white, as it is bleached.

11. C1.15 The electrolysis of water Rewrite this, underlining all the adjectives: You can test an unknown gas to see if it is chlorine by holding a small piece of damp blue litmus paper in the mouth of the tube. If the gas is chlorine the paper will turn red and then turn white, as it is bleached.