2.Physical properties of Wood are moisture content,shrinkage,density,permeability and thermal and electrical properties. Properties of Metal are good conductor of heat and electricity, luster and density and the ability to be deformed under stress without cleaving. Properties of Plastic are transparency,flexibility,elasticity,permeability,water absorption, electrical resistance and specific gravity. Properties of Glass are solid and hard,disordered and amorphous structure,fragile,transparent,inert and biologically inactive and recyclable.
5.Sustainability is the capacity to endure.
6.A sustainable product is a product that can be made several times.
Examples are clothes
7.A sustainable environment is an environment that remains diverse and biological over time. Examples are long-lived and healthy wetlands and forests.
Answers for 1 and 2 are from Wikipedia,WikiAnswers and lenntech.com
Answers for 5 and