四川省遂寧市射洪中學(xué)高中英語(yǔ)module5culturalcorner課件-資料下載頁(yè)
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【正文】 A magical experiment Aim To________________________________________ Equipment You will need______________________________ Method First， squeeze Next, take your pen Then, write After that,__________________________________ Next, Finally,____________________________________ Result The message Conclusion The message appears when you heat it because________ __________________________________________ write a secret message with invisible ink. a lemon, a small container, a pen, some white writing paper, a lighter. the lemon and pour the juice into a container. dip it into the lemon juice. your message in lager letters on a clean sheet of white writing paper. blow on the paper to dry the lemon juice. light a lighter. hold the paper near the flame. will gradually appear on the paper. The word are a light brown color. the lemon juice reacts with oxygen in the air. Revise what we have learned in this module . Homework
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