Nutrient Cycles (Grade 10 NSC Matric Life Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What proportion of Earth's surface is covered by water?
What proportion of Earth's surface is covered by water?
Over two-thirds
What percentage of water returns to the atmosphere from land areas through transpiration?
What percentage of water returns to the atmosphere from land areas through transpiration?
About 50%
Which water cycle process involves water sinking into the ground and becoming filtered?
Which water cycle process involves water sinking into the ground and becoming filtered?
Infiltration
What percentage of oxygen is stored in the lithosphere?
What percentage of oxygen is stored in the lithosphere?
99.5%
How are photosynthesis and respiration related in the oxygen cycle?
How are photosynthesis and respiration related in the oxygen cycle?
Complementary - one produces, one uses O2
What role does carbon play in living organisms?
What role does carbon play in living organisms?
Basic building block of organic materials
What percentage of the atmosphere is made up of nitrogen gas?
What percentage of the atmosphere is made up of nitrogen gas?
About 78%
What essential molecules does nitrogen help produce in organisms?
What essential molecules does nitrogen help produce in organisms?
Amino acids, proteins, and nucleic acids
Why is nitrogen fixation necessary for most organisms?
Why is nitrogen fixation necessary for most organisms?
Atmospheric is not available to them
What does nitrification convert ammonia into?
What does nitrification convert ammonia into?
Nitrate () compounds