Our atmosphere plays a Blank______ part in the nitrogen cycle, as nitrogen gas (N2) makes up about Blank______ percent of our atmosphere.Multiple choice question.very minimal; 0.001key; 78small; 12

Multiple Choice QuestionGreenhouse gases make up Blank______% of the atmosphere.Multiple choice question.more than 10<0.1about 5

Multiple Choice QuestionAmbient air is Blank______.Multiple choice question.an air mass at room temperaturethe air around usthe average composition of a planet's airair devoid of pollutants

The most abundant gas in Earth's atmosphere is __________ and the second most abundant is _________. aoxygen; nitrogen boxygen; argon cnitrogen; oxygen dnitrogen; argon

Multiple Choice QuestionWhat phrase best describes the relative amount of greenhouse gases (%) in the atmosphere?Multiple choice question.HighLowModerate

Air is a mixture of gaseous elements and compounds. Which of the following elements makes up the largest proportion of air? A. nitrogen B. water vapor C. carbon dioxide D. oxygen