How did scientists form the geologic time scale?

how is this scale organized?

what processes changed earth’s surfaces during precambrian time?

What type of cell is produced after fertilization occurs and the gametes combines ?

20 the compound al(nh3)2 has atoms of nitrogen.

What is one way intensive agriculture can contribute to climate change? a. tree loss to agriculture increases earth's albedo b. livestock manure absorbs greenhouse gases c. large herds of livestock release greenhouse gases d. fewer trees are available to replenish petroleum stores appex