Conductors and Insulators. In a conductor, electric current can flow freely, in an insulator it cannot. Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them.onductors and Insulators. In a conductor, electric current can flow freely, in an insulator it cannot. Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them.
Butterhead lettuce. A type of head lettuce whose botanical name is Lactuca sativa var. heirloom. Two common types are Boston and bibb lettuce. Have small, round, loosely formed heads with soft, buttery-textured leaves ranging from pale green on the outer leaves to pale yellow-green on the inner leaves.
Common rees of Los Angeles. Betula pendula (European white birch) Deciduous. 40â x 20â. Medium-sized tree often planted in . residential areas. Medium green, teardrop-shaped leaves with toothed edges, turning yellow in fall. Striking white bark with areas of dark gray or black. Small, brown, cone-like fruit in summer. Calocedrus decurrens (Incense cedar)