B17 Organising an ecosystem

Question 1

what factors effect decay

Answer 1

temperature
moisture
oxygen

Question 2

what do anaerobic decomposers produce

Answer 2

methane

Question 3

what’s a producer

Answer 3

an organism that absorbs light energy and produces glucose by photosynthesis (plants)

Question 4

what’s an apex predator

Answer 4

carnivores that have no predators, top of the food chain

Question 5

what’s a primary consumer

Answer 5

an organism that gains energy and nutrients through eating producers (omnivore or herbivore)

Question 6

explain the water cycle step by step

Answer 6

evaporation- water turned to water vapour by the heat forming warm moist air
condensation- moist air rises and cools, water vapour condenses to a liquid forming clouds
precipitation- water droplets in clouds get heavier and fall
percolation- water tickles through caps in soil or rocks and travel back to a water source
surface run off- if the earth is too saturated or too dry water can run off back to the water source
drank- by plants or animals
lost via transpiration or respiration

Question 7

what’s the max number of trophic levels in most food chains

Answer 7

5

Question 8

why is there a limit to how long food chains can be

Answer 8

there is alot of energy lost in transfers between trophic levels so there isn’t enough to sustain more then usually 5 levels

Question 9

how is biomass lost between trophic levels

Answer 9

respiration
secretion
if not all of the last animal/plant was eaten (bones)