{"id":7988,"date":"2012-03-07T20:53:14","date_gmt":"2012-03-07T20:53:14","guid":{"rendered":"http:\/\/provolearning.com\/blog\/?p=7988"},"modified":"2012-03-22T18:25:29","modified_gmt":"2012-03-22T18:25:29","slug":"year-5s-secret-writing","status":"publish","type":"post","link":"http:\/\/provolearning.com\/blog\/school-news\/year-5s-secret-writing\/","title":{"rendered":"Year 5’s Secret Writing"},"content":{"rendered":"

\"\"<\/a>Have you ever fancied yourself as a spy? In order to be a proper spy you will need to know how to read and write secret messages.\u00a0 In this experiment, Year 5 learned how to create them.<\/p>\n

In the process they learned that iodine can check for the presence of starch and Vitamin C. In a bowl we mixed one tablespoon of cornstarch and a tablespoon of water. \u00a0Using this mixture, we took a toothpick and wrote a secret message on a piece of paper. \u00a0\u00a0We waited for our message to dry to see the results.\u00a0\u00a0 It was barely visible on the paper. \u00a0\u00a0Then we dipped our paper into an iodine mixture to reveal the secret message.\u00a0 \u201cHappy Birthday\u201d appeared in dark purple. \u00a0It was no longer a secret and a nice surprise for the birthday boy in our class. This proved our theory that iodine reacts with the starch creating a dark purple message.\u00a0 The white paper also turned a lighter purple, due to the small amount of starch it already contains.<\/p>\n

In order to make the message disappear again, we would just add lemon juice.\u00a0 When lemon juice is painted over top of the writing, the Vitamin C in the juice reacts with the iodine to make a new colourless compound and the writing disappears.<\/p>\n

Year 5 have completed their first course in how to become a Spy.\u00a0\u00a0 Who says Science has to be boring?<\/p>\n","protected":false},"excerpt":{"rendered":"

Have you ever fancied yourself as a spy? In order to be a proper spy you will need to know how to read and write secret messages.\u00a0 In this experiment, Year 5 learned how to create them. In the process they learned that iodine can check for the presence of starch and Vitamin C. In […]<\/p>\n","protected":false},"author":25,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1,17],"tags":[],"jetpack-related-posts":[],"_links":{"self":[{"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/posts\/7988"}],"collection":[{"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/comments?post=7988"}],"version-history":[{"count":5,"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/posts\/7988\/revisions"}],"predecessor-version":[{"id":8044,"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/posts\/7988\/revisions\/8044"}],"wp:attachment":[{"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/media?parent=7988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/categories?post=7988"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/provolearning.com\/blog\/wp-json\/wp\/v2\/tags?post=7988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}