food chains

Question 1

what do direction of arrows in food chain show

Answer 1

the direction of energy transfer

Question 2

what does every food chain start with

Answer 2

a producer

Question 3

why are producers important

Answer 3

they are the source of biomass in all of the community

Question 4

what are the organisms that eat the producers called

Answer 4

primary consumers

Question 5

what are the organisms that eat the primary consumer

Answer 5

secondary consumers

Question 6

what eats the secondary consumer

Answer 6

the tertiary consumer

Question 7

what are consumers that kill and eat other predators called?

Answer 7

predators

Question 8

what are the prey

Answer 8

the animals being eaten by the predators

Question 9

explain the changes in predator and prey population numbers over time

Answer 9

the population of prey increases (lots of grass for them to eat so more of their offspring survive)
predator have more prey to kill and eat so their population increases
more predators means more prey are being killed so their population decreases
less food for predators so their population falls
number of predator falls so more prey survive and reproduce

Question 10

define stable community

Answer 10

all biotic and abiotic factors are in balance