WorksheetsFood Webs and Trophic Cascades
Total questions: 15
Worksheet time: 15mins
Which term describes series of events in an ecosystem where a top predator affects lower trophic levels?
energy transfer
ecological community
food chain
trophic cascade
In the food web shown, the snail would be considered...
primary consumer
secondary consumer
tertiary consumer
producer
What are "trophic levels"?
Levels in a food web/food chain
Levels of land in a mountain
Animal diets
How many herbivores are in this web?
1
2
3
4
What is this called?
Food Web
Food Chain
Trophic Level
Grass: Producer, consumer or decomposer?
Producer
Consumer
Decomposer
Panda: Producer, consumer or decomposer?
Producer
Consumer
Decomposer
First trophic level of a ecological pyramid includes
producers
primary consumers
secondary consumers
tertiary consumers
How is a food web different from a food chain?
Foods webs contain only producers, not consumers.
Food webs do not include decomposers.
Food webs contain many different,linked food chains.
Food webs exist in aquatic environment;food chain exist in terrestrial environment
what role do you play in the food web?
producers
consumer
Decomposer
Human
How are primary consumers different from secondary consumers?
Primary consumers eat only plants;secondary consumers eat other consumers.
Primary consumers eat other consumers;secondary consumers eat only plants.
primary consumers eat plants and other consumer;secondary consumers eat plants and decompose matter
Primary consumers eat plants and decompose matter ;secondary consumers consumers eat plants and other consumers.
The arrows in a food chain or web represents what?
They point to the organism that is being eaten.
It shows how sunlight flows within an ecosystem.
They show what direction the energy is flowing between organisms.
They represent how water is transferred within a habitat.
Which of the following best describes a trophic cascade?
A change in the population of producers due to increased sunlight
A series of changes in the population sizes of organisms at different trophic levels
The movement of nutrients through the soil
The process of photosynthesis in aquatic plants
In a food web, what role do decomposers play?
They produce energy for primary consumers
They break down dead organisms and recycle nutrients
They are the top predators in the ecosystem
They compete with primary producers for sunlight
What might happen to a food web if a top predator is removed?
The primary producers will increase in number
The ecosystem will remain unchanged
There will be an increase in the population of herbivores
The decomposers will become the new top predators
