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Scoreboard 1 2 3 X 4 5 6 O 7 Click Here if X Wins Click Here if O Wins 8 9 1 During ______, water moves from the atmosphere to the land and ocean. 1 Home Precipitation 2 All biological molecules contain what element? 2 Carbon Home 3 The combustion of coal, oil and natural gas is part of the _______ cycle. 3 Home Carbon 4 The development of a community on bare, exposed rock is an example of ______. 4 Primary succession Home 5 Water changes from a liquid to a vapor during _____. 5 Home Evaporation 6 During nitrogen fixation, nitrogen gas is converted into a form that _____ can use. 6 Plants Home 7 Bacteria are essential to what cycle? 7 Nitogen Home 8 The pioneer species that appears on bare rock is usually what? 8 Home Lichens 9 If a farmer lets a field go, what type of succession is occurring? 9 Succession Home