The plural of "otium" is "otia" and the plural of "officium" is "officia." **

Pliny the Younger wrote a series of letters on the topic of Otium (leisure/leisure time) to his friend Calvisius Rufus. These letters are known as Epistulae and are numbered 2.17, 2.20, and 5.6. In these letters, Pliny discusses the importance of finding a balance between work and leisure, as well as the benefits of taking time for oneself to relax and rejuvenate. **

A possible text for a Latin exam about Pliny the Elder and the theme of Otium and Negotium could include a passage from one of Pliny's works, such as his "Naturalis Historia," discussing the importance of finding a balance between leisure (otium) and business (negotium) in life. The text could also include questions asking students to analyze how Pliny's views on otium and negotium are reflected in his writings and how they compare to the views of other ancient Roman authors. Additionally, the exam could require students to translate and interpret specific Latin passages related to the theme of otium and negotium in Pliny's works. **

A gas heater uses a spark to ignite the gas and create a flame. Once the gas is ignited, it continues to burn and produce heat without the need for a continuous spark. Therefore, after the initial spark, there is no need for it to remain lit as long as the gas is burning. This is why you may only see a spark when the gas heater is turned on, and not a continuous flame. **

To heat a plate over a candle flame, you can hold the plate above the flame at a safe distance to avoid direct contact with the flame. Move the plate back and forth over the flame to evenly distribute the heat. Be cautious not to hold the plate too close to the flame to prevent it from getting too hot or potentially breaking. **

No, ember is not hotter than fire. Ember is the glowing remains of a fire that has started to die down, whereas fire is the active, burning flames produced by a combustion reaction. Fire typically burns at a higher temperature than ember, as it is actively consuming fuel and releasing heat and light. **

An ember tetra is a small freshwater fish that is popular in the aquarium hobby. It is known for its vibrant red and orange coloration, resembling the glowing embers of a fire, hence its name. Ember tetras are peaceful and social fish that do well in community aquariums with other small, non-aggressive fish. They are relatively easy to care for and are a great choice for beginner fish keepers. **

Yes, a horse's blaze can change over time. A blaze is a white marking on a horse's face, and it can change in size, shape, or color as the horse grows and ages. Sometimes, a horse's blaze may become more pronounced or fade as the horse's coat changes with the seasons. Additionally, injuries or scars on the face can also alter the appearance of a horse's blaze. **