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 word value is used a lot around this website. And with good reason. Value is one of the seven elements of art. Value deals with the lightness or darkness of a color. Since we see objects and understand objects because of how dark or light they are, value is incredible important to art. (I'll remind you that drawing and painting is about seeing.). Value deals directly to light. We see things because light reflects off of objects and goes into our eyes.