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1. A 3-D solid model is a compilation of solid parts of an object in a computer through use of numerous software. Most models are composed of wireframes that depict the object in wire form. It differs from 2-D drawing in that it is more complex to design and understand compared to a 2-D drawing that is based on lineage. When using these models in downstream operations, the speeds for design development will have an increment as well as visualization and communication among team members in an organizational setting.

2. When a union of two items, for example, the union of two wireframes while modeling to create a third Frame, the new Frame will compose of all the elements present in both the initial frames. An intersection occurs when two lines cross each other at a single point during the 3-D modeling process. Difference is the number of elements found in the constructive feature and not the created feature. All these can be related to parent-child relations.

3. Parent-child relations are the relationships that exist between an initial element and a new one. The initial element is referred to as a constructive element (parent) while the new element is a child because this element has several resemblances to the constructive element because of the subordination of its existence. Through this creation, the 3-D model can take shape.

4. Parametric is a type of modeling that utilizes parameters to define models of objects. They control the size and shapes of sketches utilized in the creation of features. A good example of parametric modeling is the use of dimensions to create model features. Associative or associativity is the association of parts like lines and assemblies in the 3-D model to match the changes that have occurred in the physical model.

5. A sketched feature is a drawing that shows the key features of a given object. It originates from a 2D drawing. Volume should be created through sweeping which is then defined by an intersection with an existing feature. A placed feature is a feature comprising of mechanical shape that has a purpose in the assembly of the model. A good example is a plane cut.

6. Parametric relations are the relations that exist between dimensions and functional requirements. These effects on the 3D model are noticeable when the shapes and sizes are defined to control components that are positioned within the assemblies.

7. The use of assembly constraints is vital in assembling models in that they determine how each part in an assembly will be placed, in relation to the other parts. Some of these constraints are angles and tangents.

8. One of the methods of modifying geometry in the final stages of creating a model is redesigning. This is altering the design of the object as changes in the physical object occur. In a production setting, another way would be to suppress and tally the estimated cost.

9. Design intent is the behavior a model assumes when the dimensions of the model are been modified. How an individual modifies the dimensions will determine the final result of the model. Therefore, extra care must be administered if a perfect model is to be achieved. The relations, parameters and model behaviors during modification will capture the intent of the design.

10. Feature based design modeling is a strategy used in geometry whereby, a product model is built through utilizing design features. These features represent the functional elements that the designers will use in the construction of the model.