Attendance means coming to lab prepared, appropriately attired, and in proper mental and physical condition to perform the experiment. If the experiment does not work, no amount of write up will get 50 points. If you make a great discovery, you have to record your results properly to patent or publish it. Proper notebook technique is part of this. Its possible to salvage your semester's grade with a good prep.
Team work is encouraged, but the points awarded are divided by the number of participants.
I hate the concept of written exams in lab courses, so there will not be one. I personally feel that this should be rewarded. If you have all the points you want by semester break, that's fine with me. If Attendance, etc. is not up to par, you will likely hear from me right away.