Quick Answer. Copper is classified as a metal on the periodic table and is therefore not classified according to family in the manner that plants and animals are. Copper is red-colored. It is malleable, ductile, and a good conductor of heat and electricity.
Cut watermelon stays safe for up to 10 months wrapped tightly in foil and plastic in the freezer. The flesh will be soft and inedible for eating out of hand, but it adds sweet, watermelon flavor in smoothies and sorbets.
The shelf life of watermelon depends when the watermelon was picked and how it is stored. A watermelon, actually a vegetable but normally considered a fruit, is completely edible including the rind and seeds.