Seating / Environment
Have desks facing towards the front in pairs or groups. Science tends to have lots of labs, which means students should be sat next to a partner or two to help maximize comfortability with this person.
Make sure the environment is tidy and clean before and after labs. This will help students stay focused because there will be less distraction.
During conversation
Students should talk with their partners. This makes them more comfortable with a couple of people who can then introduce them to the rest of the class. Then eventually it will lead to the whole class getting to know each other.
Toolbox
Have kids answer problems on the whiteboard. Science is a very visual and hands-on work department so this should help kids learn more.
Guided notes could help students learn vocabulary easier. This will help because Science is a vocabulary heavy department and leaving blanks on guided notes where vocab should be can help students learn the vocab easier.