The Nitrogen Cycle Flashcards

1️⃣ Familiarise yourself with the flashcards:

  • Look through all the flashcards to see what’s on both sides.
  • Make sure you understand the information on each card. If something’s unclear, click the link to the revision notes at the bottom of the page for more details.

2️⃣ Test yourself:

  • Look at the question or prompt on each card and try to remember the answer before flipping it over.
  • Check the answer and make a note of any cards you find challenging and need to go over more.

3️⃣ Consistently Review and Practice:

  • Use spaced repetition: spend more time on the cards you struggle with and go over them more often.
  • Regularly review all the flashcards to help you better understand and retain the information over time.

Note: We may include questions that have multiple correct answers. It’s useful to remember specific examples to understand these concepts better.

What is the nitrogen cycle?

The nitrogen cycle is the process by which nitrogen is converted into different chemical forms and moves through the environment.

How is nitrogen fixed into a usable form for plants?

Nitrogen-fixing bacteria in leguminous plants and lightning convert nitrogen gas (N2) into nitrates, which plants can absorb.

What is the Haber process?

The Haber process converts nitrogen gas into ammonia, used in fertilisers, which nitrifying bacteria can then convert into nitrates for plants.

How do plants absorb and use nitrogen?

Plants absorb nitrates from the soil and convert them into proteins and essential compounds for growth.

What happens to nitrogen when animals eat plants?

Animals take in nitrogen from plant proteins, which they use to build their tissues.

How is nitrogen returned to the atmosphere?

Denitrifying bacteria in low-oxygen soil convert nitrates back into nitrogen gas, which returns to the air.

You’ve used 10 of your 10 free revision notes for the month

Sign up to get unlimited access to revision notes, quizzes, audio lessons and more

Sign up