Put these events of earth’s history in the order that they happened: dominance of mammals, sharks and trilobites abundant in the oceans, dominance of reptiles, development of the ozone layer, plants and animals colonizing land.

When analyzing tree rings, what do scientists assume a thin ring indicates?

How does deforestation affect the water cycle? a. it increases the amount of runoff b.it increases the amount of percolation c. it increases the amount of transpiration d. it increases the amount of precipitationa it increases the amount of runoff

How does human environment effect the biosphere