Nervous things that go with a new job

I have a new job teaching seventh grade science. I am very excited about it. I have been going to meetings, and have had lots of scary things surface.

• will the other teachers like me
• will i be mistaken for a 7th grader (i already have by the school counselor)
• not knowing where things are like the gym and choir room
• not having the materials
• not knowing any of the people i'm working with
• switching from 1st grade to 7th
• is my boss laid back or uptight
• will i be good at teaching
• i don't know how to dissect a worm or frog...will i mess it up?

there are many other worries, but these have been some major ones that i feel often. tomorrow is open house and staff development. hopefully i'll feel better about things after tomorrow.