The nitrogen cycle Crossword
This printable crossword puzzle on the topic of Ecology & Evolution has 10 clues. Answers range from 3 to 15 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
Description
the chemical element of atomic number 7, a colorless, odorless unreactive gas that forms about 78 percent of the earth's atmosphere.
a series of events that are regularly repeated in the same order.
how much nitrogen is in the atmosphere
what is nitrogen's atomic number
what process causes nitrates and nitrites
what polymer does nitrogen help make up
a binary compound of oxygen with another element or group.
the state or process of rotting; decay.
a colorless gas with a characteristic pungent smell. It dissolves in water to give a strongly alkaline solution.
Any chemical compound that contains carbon
