Front

What is the nitrogen cycle?

Back

The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms, including atmospheric nitrogen, ammonia, nitrites, and nitrates, and is recycled in the environment.

Front

What is the primary gas that makes up 78% of the Earth's atmosphere?

Back

Nitrogen.

Front

Where is the majority of phosphorus found in the human body?

Back

In the bones.

Front

What process allows phosphorus to enter the soil from rocks?

Back

Erosion and weathering.

Front

What is atmospheric phosphate?

Back

Atmospheric phosphate refers to phosphate that is present in the atmosphere, which is not a significant part of the phosphorus cycle.

Front

What role do bacteria play in the phosphorus cycle?

Back

Bacteria help to break down phosphates, making them available for plants.

Front

What is the main difference between the nitrogen cycle and the phosphorus cycle?

Back

The nitrogen cycle involves atmospheric nitrogen and its conversion through various forms, while the phosphorus cycle does not involve a gaseous phase and primarily occurs in soil and water.

Front

What is the significance of phosphates in living organisms?

Back

Phosphates are essential for the formation of DNA, RNA, and ATP, which are crucial for energy transfer and genetic information.

Front

How do plants absorb phosphorus?

Back

Plants absorb phosphorus from the soil in the form of phosphates.

Front

What is the process of nitrogen fixation?

Back

Nitrogen fixation is the conversion of atmospheric nitrogen into ammonia or related compounds in soil, primarily by bacteria.