For photosynthesis, plants need water, carbon dioxide, and sunlight (or photons). The water provides electrons, the sunlight provides the energy, and CO2 provides a carbon sou â¦ rce.
Trick question! A single sheet of OSB weighs about 1.5 lbs per sf or 47 lbs, assuing you are asking about 7/16 thick, not 716.One sheet of plywood weighs a bit more.he weight of treated plywood will depend on the size of the  plywood. A 4 x 8 1/2 inch piece of treated plywood will weigh an  estimated 50 pounds.
* Accounts for 1/2 of truss weight 1.9 Rock Wool, 1 .2 INSULATION Glass Wool, 1 .3 Alpol .1 2x4 Bottom Chord* .7 2x6 Bottom Chord* 1.1 2x8 Bottom Chord* 1.5 2x10 Bottom Chord* 1.9 2x12 Bottom Chord* 2.2 2x4 Webs and Plates** .8 2x6 Webs and Plates** 1.3 Roof Truss or Ceiling joists at 24â O.C