What must be true for an endothermic reaction?

What must be true for an endothermic reaction? What must be true for any endothermic reaction? The chemical bonds of the products have more energy than the chemical bonds of the reactants. There are more products than there are reactants. The reaction must take place in a sealed container held at constant volume. Which statement […]

How are the Aztec pyramids position?

How are the Aztec pyramids position? How are the Aztec pyramids positioned? They are positioned like a giant celestial calendar. Who was the ruler of the Aztec empire when the Spanish conquest began? Cuauhtémoc How did the Aztecs lose to the Spanish? 1 Answer. The overthrow of the Aztec Empire by Cortez and his expedition […]

What causes different colors in quartz?

What causes different colors in quartz? Pure quartz is white or colorless, but is commonly found in almost any color imaginable. Since quartz is naturally clear, any chemical impurities will allow the color to “shine” through. Amethyst, tiger eye, adventurine, and agates are all varieties of quartz with impurities in them to cause their distinctive […]

Why was perspective ignored during the Dark Ages?

Why was perspective ignored during the Dark Ages? Why was perspective ignored during the Dark and Middle Ages? In the Dark and Middle Ages, culture and education were not high priorities. Also, most art from that time was focused on religion, so the goal was once again to show power and importance, not realistic representations […]

What is the difference between Concerto Sonata and Symphony when it comes to their movement of composition?

What is the difference between Concerto Sonata and Symphony when it comes to their movement of composition? Concertos traditionally have three movements, while symphonies have four – though there are plenty that have more, or less. That aside, both follow typical formal musical structures. The Classical era concerto introduced the ‘cadenza’, which is sort of […]

What are Orthogonals in art?

What are Orthogonals in art? Orthogonal is a term derived from mathematics. It means “at right angles” and is related to orthogonal projection, another method of drawing three-dimensional objects. The term is applied to the vanishing lines used in perspective drawing as these are: At right angles to each other in two-point perspective. What is […]

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