T4.2 Energy Flow

Question 1

Food Chains

Answer 1

A sequence showing the feeding relationships and energy flow between species.
* used to study energy transfew
* Arrows indicate flow of energy
Mouse -> Owl = energy transfew

Question 2

Food webs

Answer 2

An interconnecting series of food chains

Question 3

Trophic levels

Answer 3

Refers to an organism’s position in a food chain.
* Help classify organisms by their feeding relationships with other organisms of the same ecosystem
* Producer -> Primary Consumer -> Secondary Consumer -> Tertiary Consumer -> Quaternary Consumer
* 90% of energy is lost from one trophi level to the higher trophic level

Question 4

What do most ecosystems rely on for energy?

Answer 4

Light - producers harness light energy through photosynthesis