In each of these examples, the scientists found that tipping points occurred and conditions changed dramatically over a relatively short period of time.
From my earliest years, it became a solidified tradition to go on long drives throughout New England to witness the foliage change, snack on candy and donuts.
The correlation of carbon dioxide with temperature, of course, does not establish whether changes in atmospheric composition caused the warming and cooling trends or were caused by them.
There are several hypotheses, including warming or cooling of Earth, changes in seasonal fluctuations or ocean currents, and changing positions of the continents.
Although change in carbon dioxide content closely follows change in temperature during periods of deglaciation, it apparently lags behind temperature during periods of cooling.
The forms and methods of gymnastics teaching in physical education major of universities and colleges are changing with the changing of education forms in China.