PLTW - IED EOC Review Terms with
Definitions
Innovation - Answer-An improvement of an existing technological product, system, or method of
doing something.
Invention - Answer-A new product, system, or process that has never existed before, created by
study and experimentation.
Design Brief - ...
Object Line - Answer✔✔-A heavy solid line used on a drawing to represent the outline of an object.
Oblique Sketch - Answer✔✔-A type of sketch involving a combination of a flat, orthographic front with
depth lines receding at a selected angle, usually 45 degrees.
Orthographic Projection - Answer✔✔-A method of representing three-dimensional objects on a plane
having only length and breadth. Also referred to as Right Angle Projection.
Perspective Sketch - Answer✔✔-A form of pictorial sketch in which vanishing points are used to provide
the depth and distortion that is seen with the human eye. Perspective drawings can be drawn using one,
two, and three vanishing points.
Shading - Answer✔✔-The representation of light and shade on a drawing or map.
Technical Working Drawing - Answer✔✔-A drawing that is used to show the material, size, and shape of
a product for manufacturing purposes.
Tone - Answer✔✔-The general effect of color or of light and shade in a picture.
ANSI - Answer✔✔-American National Standards Institute: A private, non-profit organization that
coordinates the development and use of voluntary consensus standards in the United States.
Dimension Lines - Answer✔✔-Lines that are thin lines capped with arrowheads, which may be broken
along their length to provide space for the dimension numerals.
Extension Lines - Answer✔✔-Thin lines used to establish the extent of a dimension. Extension lines begin
with a short space from the object and extend to about .125 inches past the last dimension line.
Extension lines may cross object lines, center lines, hidden lines, and other extension lines, but may not
cross dimension lines.
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