Examlex
Approximately how many radioactive atoms are present in a tritium sample with an activity of 0.6 × 10−6 Ci and a half-life of 12.3 years? (1 Ci = 3.7 × 1010 decays/s)
Wilderness
A natural environment on Earth that has not been significantly modified by human activity, offering critical habitat for wildlife and opportunities for human recreation.
Clear-cutting Methods
Forestry practices involving the complete removal of all trees from a particular area, often used for timber extraction.
Agricultural Land
Land designated for agricultural purposes, including the cultivation of crops and rearing of animals, to produce food and other agricultural products.
Second-growth Forests
Forests which have re-grown after a significant disturbance, such as logging or a natural event, and are in a secondary stage of development.
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