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.
1 4'x 8' - 2 thick with 18oz vinyl mat covering. 2  Excellent mat for gymnastics and/or martial arts. 3  Easy to clean-Just wipe of with a damp rag or mop. 4  1 year warranty.hese mats are covered with a durable vinyl mat covering and have a Velcro tab system on all 4 sides so that multiple mats can be connected together to cover large areas. Material â Crosslink Polyethylene foam encased with 18 oz vinyl fabric. Size â Each mat is 4â x 8'.