Food chains and food webs describe feeding relationships. The population of species in a food chain is shown using a pyramid of numbers. Organisms in an ecosystem affect each other’s population.
What does a food chain always start with?
A top predator
Which is the secondary consumer in this food chain: grass -> grasshopper -> frog -> hawk?
What does an omnivore eat?
Meat and plants
What is wrong with this pyramid of numbers?
Hawks don't eat thrushes
The clover should be at the bottom
Snails don't eat clover
What can we conclude from this pyramid of numbers?
The producer must be very large
The producer must be very small
The primary consumer must be a carnivore
What is a habitat?
The place where an organism lives
All the conditions that surround an organism
All the populations of different organisms
What is likely to happen to the population of slugs if the population of thrushes decreases?
It will increase
It will decrease
It will stay the same
What is likely to happen to the population of thrushes if the population of voles increases?
What is likely to happen to the population of foxes if the population of rabbits decreases?
What do the arrows in a food chain show?
How many organisms are present
What eats what
The transfer of energy