I like the style promoted by The Gregg Reference Manual because it is simple and straightforward. Regarding hyphenated words, Gregg says, In a heading or title, capitalize all the elements except articles, short prepositions, and short conjunctions.. In Gregg, short means fewer than four letters. Following the Gregg way, both parts of Tune-Up are capitalized because up is an adverb in that expression.
A geodesic dome is a sphere-like structure composed of a complex network of triangles. The triangles create a self-bracing framework that gives structural strength while using a minimum of material.
The term geode is derived from the Greek word Geoides which means earthlike.. A geode is a round rock which contains a hollow cavity lined with crystals. Rocks which are completely filled with small compact crystal formations such as agate, jasper or chalcedony are called nodules. The only difference between a geode and a nodule is that a geode has a hollow cavity, and a nodule is solid. Geodes begin as bubbles in volcanic rock or as animal burrows, tree roots or mud balls in sedimentary rock.