This is the only icebreaker that I use with my high school science students! I've used it for over 5 years and it is always my favorite day of the year. This icebreaker activity allows you to 1) talk science on day one 2) randomly group students for your seating chart 3) spend time getting to know your students and 4) allowing them to get to know you! -by ⚛ Jen Siler's Classroom
Balloon Rockets: What you need: Piece of yarn (or string) – cut to about 6 feet, thread on a straw and tie string to two chairs. Put tape on straw to attach a Balloon that has been blown up but has not been tied. Pull attached balloon to one side and let go! Experiment shows action and reaction. Kids will want to do over and over so be prepared to blow up a few balloons and have extra tape on hand. Link leads to step by step instructions with a photo tutorial.