#1
Which element is primarily responsible for the greenhouse effect?
#2
Which biogeochemical cycle involves the conversion of nitrogen gas into a form that plants can use?
#3
What is the primary source of phosphorus for living organisms?
#4
Which of the following is not a greenhouse gas?
#5
Which of the following is not a component of the water cycle?
#6
What is the main process by which carbon enters the atmosphere?
#7
Which of the following is not a reservoir in the phosphorus cycle?
#8
Which biogeochemical cycle is primarily affected by human activities such as burning fossil fuels and deforestation?
#9
Which organism plays a crucial role in the nitrogen cycle by converting nitrogen gas into a form usable by plants?
#10
What is the primary process responsible for removing carbon dioxide from the atmosphere?
#11
In the water cycle, what process returns water from plants to the atmosphere?
#12
What is the primary way phosphorus is released from rocks and sediments into the soil?
#13
Which process is responsible for converting atmospheric nitrogen gas into ammonia, a form usable by plants?
#14
Which process returns nitrogen to the atmosphere in the nitrogen cycle?
#15