Food Chains, Trophic Levels and Food Webs (AQA A-Level Geography): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the ultimate source of energy for all organisms in an ecosystem?
What is the ultimate source of energy for all organisms in an ecosystem?
The Sun
Why can't energy be reused in ecosystems once it has been transformed or lost?
Why can't energy be reused in ecosystems once it has been transformed or lost?
Energy flows in one direction only
What do producers do to obtain their energy?
What do producers do to obtain their energy?
Make their own food via photosynthesis
A grasshopper eats grass, then a frog eats the grasshopper. What trophic level is the frog?
A grasshopper eats grass, then a frog eats the grasshopper. What trophic level is the frog?
Trophic level 3
In a food chain, which direction do arrows point?
In a food chain, which direction do arrows point?
From eaten organism to the eater
What is the formula for net primary productivity (NPP)?
What is the formula for net primary productivity (NPP)?
NPP = GPP - Respiration
Why does biomass decrease at higher trophic levels in a pyramid of biomass?
Why does biomass decrease at higher trophic levels in a pyramid of biomass?
Energy lost via respiration, movement, waste
What does gross primary productivity (GPP) measure?
What does gross primary productivity (GPP) measure?
Total energy captured via photosynthesis
How do food webs provide ecosystem stability?
How do food webs provide ecosystem stability?
Alternative food sources buffer impacts
What are primary consumers also known as?
What are primary consumers also known as?
Herbivores