observation
Serendipity occurs in a situation where something is found that was not expected to be found.
Observation is an abstract noun because it represents a concept or idea rather than a physical object. It refers to the act of noticing or perceiving something through the senses.
The action of seeing or noticing refers to using one's visual perception to become aware of something in one's environment. It involves the process of light entering the eyes and being interpreted by the brain to form a mental representation of the object or scene being viewed.
The term that best describes the occurrence of total solar eclipses is "syzygy," which refers to the alignment of the Earth, the Moon, and the Sun in a straight or nearly straight line, causing the Moon to appear to block out the Sun from view on Earth.
observation
In math, it is important to know what the terms in a word problem mean. The term yearly refers to something that has an annual occurrence.
The word "incident" can be used as a noun or an adjective. As a noun, it refers to an event or occurrence. As an adjective, it describes something that is related to or connected with an event or occurrence.
Scarcity refers to a very small supply of something. For example for people who are homeless they have a scarce supply of food. Scarcity also means the rarity of occurrence or appearance.
anniversary
Serendipity occurs in a situation where something is found that was not expected to be found.
Isolated refers to probability of occurrence, not to strength. It means there is a 20% or less chance of occurrence.
Observation is an abstract noun because it represents a concept or idea rather than a physical object. It refers to the act of noticing or perceiving something through the senses.
In geology, an erratic cycle refers to an irregular occurrence in geological phenomena. These occurrence happen at any particular period.
positive reinforcement- refers to any immediate pleasant occurrence that follows a behavior.
anniversary
An incident refers to an event or occurrence that is unexpected or unplanned, often resulting in a disruption or problem. It is typically used to describe incidents in various contexts such as workplace incidents, security incidents, or IT incidents.