B17

Question 1

why are plants producers

Answer 1

the glucose from photosyntheisis is synthesised into other compounds and this adds to biomass

Question 2

what are producers eaten by

Answer 2

primary consumers

Question 3

what are primary consumers eaten by

Answer 3

secondary consumers and these can be eaten by tertiary consumers

Question 4

why do primary consumers have to eat a lot of plant material

Answer 4

as cellulose is difficult to digest so they need a lot of nutrients and plants stay in one place

Question 5

what are decomposers

Answer 5

bacteria and fungi and they break down waste material or dead organisms

Question 6

draw out the carbon cycle

Question 7

what is the water cycle

Answer 7

water evaporates from water bodies
when the water vapour rises it cools and condenses
it then falls as rain
water moves from one place to another and eventually ends back in water bodies

Question 8

what are the factors affecting rate of decay by decomposers

Answer 8

temperature - enzymes controlling decay may become denatured
moisture - microorganisms grow faster in moist conditions
oxygen

Question 9

what is compost used as

Answer 9

compost produced by the decay of waste organic material is used as natural fertiliser