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Shoaling and schooling. These powder blue tangs are shoaling. They are swimming somewhat independently, but in such a way that they stay connected, forming a social group. These bluestripe snapper are schooling. They are all swimming in the same direction in a coordinated way. In biology, any group of fish that stay together for social reasons ...
In fluid dynamics, wave shoaling is the effect by which surface waves, entering shallower water, change in wave height. It is caused by the fact that the group velocity, which is also the wave-energy transport velocity, decreases with water depth. Under stationary conditions, a decrease in transport speed must be compensated by an increase in ...
Swarm behaviour. A flock of auklets exhibit swarm behaviour. Swarm behaviour, or swarming, is a collective behaviour exhibited by entities, particularly animals, of similar size which aggregate together, perhaps milling about the same spot or perhaps moving en masse or migrating in some direction. It is a highly interdisciplinary topic.
v. t. e. In the United States, academic grading commonly takes on the form of five, six or seven letter grades. Traditionally, the grades are A+, A, A−, B+, B, B−, C+, C, C−, D+, D, D− and F, with A+ being the highest and F being lowest. In some cases, grades can also be numerical. Numeric-to-letter-grade conversions generally vary from ...
In oceanography, geomorphology, and geoscience, a shoal is a natural submerged ridge, bank, or bar that consists of, or is covered by, sand or other unconsolidated material, and rises from the bed of a body of water close to the surface or above it, which poses a danger to navigation. Shoals are also known as sandbanks, sandbars, or gravelbars.
Grade Age School Stage Kindergarten: 5–6 or 4–5 Preschool: Elementary school: Grade 1: 6–7 or 5–6 Primary school: Grade 2: 7–8 or 6–7 Grade 3: 8–9 or 7–8 Grade 4: 9–10 or 8–9 Grade 5: 10–11 or 9–10 Grade 6: 11–12 or 10–11 Grade 7 12–13 or 11–12 Secondary school: Junior high school: Grade 8 13–14 or 12–13
Grading in education is the process of applying standardized measurements for varying levels of achievements in a course. Grades can be assigned as letters (usually A to F), as a range (for example, 1 to 6), as a percentage, or as a number out of a possible total (often out of 100). [1]
A school of large pelagic predator fish (bluefin trevally) sizing up a school of small pelagic prey fish (). Pelagic fish live in the pelagic zone of ocean or lake waters—being neither close to the bottom nor near the shore—in contrast with demersal fish that live on or near the bottom, and reef fish that are associated with coral reefs.