It has no effect. Density of a substance is the same no matter the size or shape of the sample.
Answer:
Yes, this is a scientific model. It is an accurate representaction of a process. The model shows the water cycle, which is an occurrence that is difficult to observe directly.
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A trophies level pertains to the position of an organism in the food chain. Humans are the most dominant organism that belong to more than one trophies level. When we eat plants we become the secondary or the tertiary consumers.
Birds are also organisms that belong to more than one trophies level. When birds eat seeds they become the primary consumer, but when they eat insects they become the secondary or even the tertiary consumers.