10 questions🇬🇧English
🦉 Ecosystems & Food Webs – Year 9
Biology · Year 9 (KS3) — producers, consumers, food webs, pyramids and interdependence
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Questions
In the food chain grass → rabbit → fox, what is the role of the grass?
Producer
Primary consumer
Decomposer
Secondary consumer
20s
What do the arrows in a food chain show?
The direction animals migrate
How many of each organism there are
Which animal is the biggest
The direction energy is transferred
20s
What is the main job of decomposers such as fungi and bacteria in an ecosystem?
Pollinating flowers so plants reproduce
Breaking down dead material and returning nutrients
Hunting and eating live animals
Making food from sunlight by photosynthesis
20s
In the food chain grass → rabbit → fox, what type of consumer is the fox?
Secondary consumer
Primary consumer
Tertiary consumer
Producer
20s
In the food chain grass → grasshopper → frog → heron, which trophic level is the frog at?
Trophic level 1
Trophic level 2
Trophic level 3
Trophic level 4
30s
In grass → rabbit → fox, all the foxes are removed. What will most likely happen to the grass at first?
It decreases because more rabbits survive to eat it
It stays the same because foxes do not eat grass
It increases because rabbits have less food
It increases because foxes no longer trample it
30s
In a predator–prey cycle, why does the peak in predator numbers come after the peak in prey numbers?
Prey hide from predators until their numbers peak
Predators only hunt once the prey numbers start falling
Predators need time to breed once food is plentiful
Prey animals always breed more slowly than predators
30s
Why is a pyramid of numbers for oak tree → caterpillars → blue tits not a normal pyramid shape?
One large tree feeds a very large number of caterpillars
Oak trees lose energy faster than caterpillars do
Blue tits outnumber the caterpillars they eat
Caterpillars are producers, not consumers
30s
A pesticide gets into a lake: plankton → small fish → large fish → osprey. Which organism will have the highest concentration of it?
Osprey
Large fish
Small fish
Plankton
30s
Producers store 10,000 kJ. If about 10% of energy passes to each next level, how much reaches the secondary consumers?
About 9,000 kJ
About 100 kJ
About 10 kJ
About 1,000 kJ
60s