U3 have been exploring physical changes and states of matter. In today’s practical demonstration, students observed how solid iodine sublimates directly into a gas when heated <img class="xz74otr x15mokao x1ga7v0g x16uus16 xbiv7yw" src="https://static.xx.fbcdn.net/images/emoji.php/v9/t50/1/16/1f525.png" alt="
