Nitrogen cycle (Edexcel GCSE Biology): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
ShowHide
Practise the questions
13 questions from this quiz
Why is nitrogen essential for all living things?
Why is nitrogen essential for all living things?
It forms amino acids for proteins
What percentage of the atmosphere is made up of nitrogen gas?
What percentage of the atmosphere is made up of nitrogen gas?
78%
In what form must nitrogen be for plants to absorb it through their roots?
In what form must nitrogen be for plants to absorb it through their roots?
Nitrates ()
Where do nitrogen-fixing bacteria live?
Where do nitrogen-fixing bacteria live?
In soil or in root nodules of legumes
Which of these are examples of leguminous plants?
Which of these are examples of leguminous plants?
Peas, beans, and clover
How does lightning fixation work in the nitrogen cycle?
How does lightning fixation work in the nitrogen cycle?
Energy makes react with
What do nitrifying bacteria convert ammonia into?
What do nitrifying bacteria convert ammonia into?
First nitrites, then nitrates
Under what conditions do denitrifying bacteria operate?
Under what conditions do denitrifying bacteria operate?
In waterlogged, oxygen-scarce soils
Which bacteria type is described as 'perhaps the most important'?
Which bacteria type is described as 'perhaps the most important'?
Nitrogen-fixing bacteria
What do decomposer bacteria break down into ammonia?
What do decomposer bacteria break down into ammonia?
Proteins and urea from dead organisms
Why do farmers use crop rotation with leguminous crops?
Why do farmers use crop rotation with leguminous crops?
To enrich soil with nitrogen naturally
How do artificial fertilisers differ from natural ones?
How do artificial fertilisers differ from natural ones?
Work quickly, expensive, environmental risks
What environmental problem can overuse of artificial fertilisers cause?
What environmental problem can overuse of artificial fertilisers cause?
Eutrophication in water bodies