Perfect for an interview lesson! Practical and demonstration lesson to promote oracy, class discussion and enthuse students in science early on. The lesson consists of a mini practical to explain the link between ocean acidification and carbon dioxide. Intrigue of a shell less egg and linkage to the shells of sea creatures. Interpreting graph skills and 3 way differentiation of worksheets following worksheet assessing students knowledge on the subject. Used for an interview and as such lesson plan is included. A great lesson to teach and engage students with.