Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    can someone please break down the nitrogen and carbon cycle for me please? and any predictions for what will be coming up in this years B1 paper for edexcel?
    Offline

    0
    ReputationRep:
    Carbon cycle:
    First I'd look at the Causes:
    *Burning of fossil fuels
    *Respiration of organisms
    *Organisms that eat plants transfer carbon.
    *Chalk dissolves when exposed to slightly acidic rain. This releases more carbon in the atmosphere.

    Then I'd look at how it is reduced out:
    *plants absorb carbon dioxide. Enables their cells to produce sugars from the process of photosynthesis. Sugars form lipids (fats and oils)

    The main 2 process of transferring carbon are RESPIRATION and PHOTOSYNTHESIS.



    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    Nitrogen cycle:
    *Plants and animals can't absorb nitrogen as a gas. Therefore, they need to be in the form of nitrates.
    *2 kinds of bacteria who change nitrogen gas into nitrates.
    *1, nitrogen fixing bacteria, found in root nodules in leguminous plants. They convert (fix) nitrogen gas into nitrates for the plant. (Mutualistic relationship)
    *2 nitrifying bacteria, converts ammonia from decaying plants and other waste into nitrates. The nitrates are then absorbed by the plants.

    *Animals obtain nitrates from eating plants. This transfers nitrogen from the plant to the animal. This transfer would carry on as the animals eat other animals, still transferring the nitrogen.

    * lightning can break apart nitrogen molecules. The nitrogen molecules which are broken then react with the oxygen in the atmosphere. This forms nitrogen oxide. Which then dissolves in rain drops.

    *The nitrates which aren't absorbed by plants are release back into the atmosphere. This is done by DE-NITRIFYING BACTERIA. The bacteria converts nitrates back into nitrogen gas which is then release back into the atmosphere.

    Hope this helps. 😊
    Posted from TSR Mobile
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Would you like to hibernate through the winter months?
    Useful resources

    Study tools

    Rosette

    Essay expert

    Learn to write like a pro with our ultimate essay guide.

    Thinking about uni already?

    Thinking about uni already?

    See where you can apply with our uni match tool

    Student chat

    Ask a question

    Chat to other GCSE students and get your study questions answered.

    Creating

    Make study resources

    Create all the resources you need to get the grades.

    Planner

    Create your own Study Plan

    Organise all your homework and exams so you never miss another deadline.

    Resources by subject

    From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

    Papers

    Find past papers

    100s of GCSE past papers for all your subjects at your fingertips.

    Help out other students

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.