Safety toolbox topic on the different chemical label colors and numbers and what they mean Safety toolbox topic on the different chemical label colors and numbers and what they mean
Ice Age: Continental Drift is the 4th film from the 5 part Ice Age franchise where Nicki Minaj voices a Woolly Mammoth named Steffie. It was released on July 13, 2012. It starts with Scrat still trying to capture the acorn. But messing up, he accidently makes Sid, Diego, and Manny to set off drift.
The theoretical extent of these ice sheets during the ice age 1.5 mya is shown in white on the map below. (White area = maximum glacial extent 1.5 million years ago in the Pleistocene Epoch - Microsoft Encarta) Ice ages are said to have occurred every 150 million years, and last for at least 1 million years. According to the ice age theory, our current warm period will end with the beginning of another cold phase in 23,000 years time. Geologists claim that there have been 5 major ice ages. During ice ages the boundary of the ice sheet is hypothesised to spread and contract in cycles.