B17: Organising an Ecosystem

Question 1

producers carry out

Answer 1

photosynthesis

Question 2

main producers in the ocean

Answer 2

algae and phytoplankton

Question 3

animals that eat the producers

Answer 3

primary consumers

Question 4

primary consumers eaten by

Answer 4

secondary consumers

Question 5

problem with eating plants for primary consumers

Answer 5

cellulose is hard to break down

Question 6

problems for secondary consumers

Answer 6

having to catch them

Question 7

examples of decomposers

Answer 7

bacteria, fungi

Question 8

what do decomposers do with the products

Answer 8

return mineral ions to the soil and release carbon dioxide into the air

Question 9

water cycle:

Answer 9

rains, surface run-off and percolation/infiltration, ocean, evaporation and condensation into clouds.

Question 10

carbon cycle: processes

Answer 10

-photosynthesis
-death and decay
-feeding
-respiration
-burning of fossil fuels

Question 11

best conditions for decay

Answer 11

-high temperature
-high moisture (easier to digest food, not dry out)
-abundance of oxygen, decomposers need to respire.

Question 12

another pro about abundance of oxygen

Answer 12

kills off weed seeds in compost

Question 13

anaerobic decomposition produces what

Answer 13

methane

Question 14

how is animal and plant waste a fuel

Answer 14

put in biogas generators and produce methane anaerobically, which is flammable fuel.