To: All Year 10 students Subject: Trip to the Science Museum We are pleased to announce that the Year 10 trip will take place on Thursday, 14 November. The bus will leave the school gate at 8:00 a.m. and return at about 3:30 p.m. Students should wear comfortable shoes and bring a packed lunch and a bottle of water. There is a small café at the museum, but it is expensive. The cost of the trip is 40 riyals, which includes the bus and the entry ticket. Please return the signed permission form to your class teacher by Sunday, 3 November, together with the money. Students who forget the form will not be able to join the trip. If you have any questions, please contact Mrs. Salma in the science department.

Question: Why are students asked to bring a packed lunch?