2. Quality Indicator 1.2.2

4. Horizon Line ~ In perspective this line is drawn across the canvas at the viewer's eye level. It represents the line in nature where the sky appears to meet the ground.

5. Vanishing Point ~ The single point in a picture where all parallel lines that run from the viewer to the horizon line appear to come together. The vanishing point is generally placed at the viewer's eye level.

7. Three Dimensional ~ Having height, width, and depth. A box is three dimensional. This project brings hand and eye coordination skills to the artwork.

9. Linear Perspective ~ A mathematical system for creating the illusion of space and distance on a flat surface such as a canvas or wall.

10. Orthogonal Lines ~ Straight diagonal lines drawn to connect points around the edges of a picture to the vanishing point. They represent parallel lines receding into the distance and help draw the viewer's eye into the depth of the picture.

11. Leonardo recognized that one way to paint scenes realistically was to observe with great care how animals, people, and landscapes really looked. He was also careful to notice the differences in how an object looked when it was close by and when it was farther away, and when it was seen in bright light and in dim light.

12. http://www.mos.org/leonardo/