Definition of in session. 1  1 : in the process of meeting formally Congress is in session right now. 2  2 US : conducting classes School will be back in session at the beginning of September.
Mylar Pieces. Circles & Hexagons. Multiple Sizes. Hexagon & Circle Mylar Pieces are heat resistant and made especially for quilters who desire to make perfectly shaped circles and hexagons each time with hand or machine piecing and appliquÃ©. Cut fabric 1/4 larger than Mylar template.
Procedure. 1  Inflate one helium balloon and one Mylar balloon. 2  Put both balloons in a room together. Observe how long it takes for them to lose altitude and drop to the ground, taking measurements each day. 3  Repeat steps 1-3 for three more trails to ensure accuracy.  Record your 1  results. Research the physical properties and history of Mylar and Latex.