Weathering is a force since it naturally breaks rock down into sediment a) chemical b)destruction c)mechanical d)construction

The first atomic explosion was detonated in the desert north of alamogordo, new mexico, on july 16, 1945. what percentage of the strontium-90 ( yr) originally produced by that explosion still remains as of july 16, 2016?

Find the percent of change from 500 oz to 800 oz

Put these ecosystems in order of least biodiversity to most biodiversity 1. mediterranean forest 2. indonesian rain forest 3. arctic ocean