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observe


uhb-ZURV

to watch someone or something carefully

  observe

record


rih-KORD

to write down information so it can be kept

  record

compare


kuhm-PAIR

to judge one thing against another and notice how they are alike and different

compare

migration


mye-GRAY-shuhn

a journey that some animals take at a particular time of the year to another place or climate

  migration

estimate


ESS-ti-muht

a rough guess about an amount, a distance, a cost, etc.

estimate
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