This seems like a very engaging project! I like how the plan is mapped out day by day. The use of technology in this project is strong and allows the students to experience an aspect of science they would not be able to recreate in the classroom otherwise.
It would be nice to know what role the teacher has in providing evaluative material. There is a lot of collaboration among students but what about descriptive feedback from the teacher to the students?
Overall a very solid lesson and one I'd love to do myself if I had access to iPads and taught 9th graders.
PDF functioned perfectly. Lesson seems to be technically sound provided you have access to the proper technological equipment.