Alternatively, you can space the seeds 6 to 10 inches (15.24 to 25.4 cm) apart and thin your seedlings out once they reach 4 inches (10 cm) tall. At that point, you should consider thinning them out so that they are 18 inches (45.72 cm) apart.
Volume - Arcy Art Original Oil Paintings Art Dictionary. Volume is the size, bulk and dimension of a particluar object. It is an object that is usually thick, nontransparent and exists solidly and three-dimensionally in space and it is not flat. In a painting a volume is represented with light and shade and usually in spatial situation to make the nonflatness clear.
The seven elements of art are line, shape, space, value, form, texture, and color. These elements are the building blocks, or ingredients, of art. A line is a mark made on a surface. A shape is a flat area of enclosed space. Space is the illusion of depth on a flat surface. Value is the lightness or darkness of objects in an artwork. Form means the artwork has height, width, and depth.