when there is only small amount
Early geographers used direct observation and modern geographers collect data using indirect observation
It would be almost impossible to accurately count every animal in a population. Indirect counting methods are used to give indices of the relative numbers. This involves looking for things such as nests, burrrows, skat, tracks etc. to estimate the population.
No, indirect questions do not require question marks.
conversion cost = direct wages + factory overheads (indirect material + indirect wages)
Direct, Indirect and Partitive.
An ecologist can determine the size of a population without counting every organism by either sampling, mark-and-recapture studies, or indirect or direct observation.
This is an example of indirect observation - you are not seeing the animals directly but are viewing evidence of their existence.
Indirect observation is a technique in research that utilizes pre-recorded behavior from secondary sources. The researcher must rely on the reported observations of others.
The members of a population may be small or hard to find. Indirect observation is when it would be easier to observe what the animals left behind, like a nest or tracks, rather than the organism themselves. Ex: If there are 120 nests in an area, you can find the number of swallows by multiplying 120 by , or 480 swallows.
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Sampling - counting the number of organisms in a small area and multiplying to estimate the number in a larger areaMark & Recapture - capture an organism & release it to remix with population. Then recapture some more in that area to determine population size. Formula is as follows: R (marked recaptures) / C (total in second sample) = M (marked initially) / N (total pop. size)Indirect Observation - estimating the population size by tracks, nest or other animal signs in an ecosystem.Direct Observation - count all members of a population in an ecosystem
You are not DIRECTLY OBSERVING IT!