A model is a three-dimensional of a person/thing or of a proposed structure.
A mock up is a model or replica of a machine or structure, used for instructional or experimental purposes.
A prototype is a first or preliminary version of a device or vehicle from which other forms are developed.
Answer:
True
Explanation:
<u>When making tempera, the content egg yolk is used to bind the power pigment and water (same amount as the yolk). </u>Egg white is not used, and it should be completely removed from the yolk. <u>The ingredients are mixed until the consistency is reached.</u>
As the egg yolk dries fast, usually some fermentation agent (like vinegar) is added in small amounts, to prevent drying and cracking on the painting. The fast-drying prevents the blending or correcting, so the art is done with strokes over strokes.
If stored correctly, paintings done with tempera can last a long, as some from the early centuries are still preserved. Tempera was used a lot during the High Renaissance.
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