Vocabulary
A model that shows feeding relations between organisms in an ecosystem
What is a food web?
Consider this food chain: blackberries=> bird=> cat Which organism is the producer?
What is a blackberries?
A kind of consumer that uses the waste or dead remains of other organisms as a source of energy.
What is a decomposer?
What percentage of energy is transferred from level to level?
What is 10%?
Can an organism be part of more than one food chain? A) no, because it cannot be predator and prey at the same time B) no, because the arrows in a food web can only flow in one direction C) yes, because it can be prey for more than one organism D) yes, because it may live in more than one environment
What is C, Yes because it can be prey for more than one organism?
An interaction in a food web where one population directly affects the abundance of another.
What is direct effect?
Consider this food chain: grass=> grasshopper=> mouse => raccoon =>hawk. Which organism is the top predator ?
What is the hawk?
A certain type of bear mainly eats trout. If the trout population declines, what will most likely happen to the bear population? A) it will decrease B) it will increase C) it will remain the same D) it will increase and then decrease
What is A it will decrease
Which has the most energy in a trophic pyramid? A) apex consumer B) primary producers C) secondary consumers
What is B, primary producers?
A model that shows how energy flows from one stage to the next in the food chain.
What is a trophic pyramid?
An individual path in a food web.
What is a food chain.
Consider the food chain: grass=> grasshopper=> frog=> snake. What would happen in the ecosystem if the grasshopper population died? A) snakes would eat the grasshopper B) it would be fine, frogs prefer other insects anyway C) the frog population would die from the decrease in their food supply
What is C, the frog population would die from the decrease in their food supply?
Which of the following organism is a secondary consumer in the trophic pyramid? A) snake B) grasshopper C) earthworm
What is A snake?
How does the food chain start again after the decomposer does its' job? A) because the decomposer spreads the seeds B) because the decomposer breaks the dead or decaying organism down and the nutrients go back into the soil, causing any seeds that have been dispersed a good environment to reproduce C)the decomposer does not totally break the organism down and some of the organism is still alive
What is B, because the decomposer breaks the dead or decaying organism down and the nutrients go back into the soil, causing any seed that have been dispersed a good environment to reproduce?
An interaction in a food web where one population affects the abundance of another
What is indirect affect
Consider this food chain: acorns=> squirrels=> hawks Which of these is the producer?
What are the acorns.
Why are decomposers important organisms in a food web? A) They produce oxygen. B) They prey on carnivores. C) They are food for producers D) They return nutrients to the soil
What is D they return nutrients to the soil?
When a frog eats a grasshopper, how much of the grasshopper's energy is transferred to the frog? A) 10% B) 25% C) 50% D) 90%
What is 10%?