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