b16 organising an ecosystem

Question 1

what are photosynthetic organisms ?

Answer 1

the producers of biomass for life on earth

Question 2

what does photosynthetic mean?

Answer 2

organism can produce glucose by photosynthesis

Question 3

what can food chains represent?

Answer 3

feeding relationships within a community

Question 4

what do all food chains begin with and what does this do?

Answer 4

all food chains begin with a producer which synthesises molecules

Question 5

what are producers usually?

Answer 5

a green plant or algae which makes glucose by photosynthesis

Question 6

what is used by ecologists to determine the distribution and abundance of species in an ecosystem?

Answer 6

a range of experimental methods using transects and quadrats

Question 7

why do ecologists use a range of experimental methods using transects and quadrats ?

Answer 7

to determine the distribution and abundance of species in an ecosystem

Question 8

briefly explain food chain
(producers, primary consumers, secondary consumers, tertiary consumers)

Answer 8

producers are eaten by primary consumers , which in turn may be eaten by secondary consumers and then tertiary consumers

Question 9

what are predators?

Answer 9

consumers that kill and eat other animals and those eaten are prey

Question 10

what happens in a stable community?

Answer 10

the numbers of predators and prey rise and fall in cycles

Question 11

why are all materials in the living world recycled?

Answer 11

to provide the building blocks for future organisms

Question 12

what does the carbon cycle do?

Answer 12

the carbon cycle returns carbon from organisms to the atmosphere as carbon dioxide to be used by plants in photosynthesis

Question 13

how does the carbon cycle start?

Answer 13

the carbon cycle starts with carbon dioxide in the atmosphere

Question 14

what is the only way that carbon can enter the carbon cycle?

Answer 14

by photosynthesis

Question 15

how does carbon dioxide return back to the atmosphere?

Answer 15

by aerobic respiration

Question 16

every single living organism carries out?

Answer 16

respiration

Question 17

how do plants and algae take in carbon dioxide from the atmosphere?

Answer 17

in photosynthesis

Question 18

whys is carbon used?

Answer 18

to make carbohydrates,fats and proteins which make up the cells of plants and algae

Question 19

eventually, all animals and plants die. What happens?

Answer 19

carbon in waste products and dead remains

Question 20

waste products and dead remains are then broken down by?

Answer 20

decomposing microorganisms for example bacteria and fungi

Question 21

what happens when decomposers carry our respiration?

Answer 21

the carbon in the waste and dead remains is returned to the atmosphere as carbon dioxide

Question 22

Why are decomposers(microorganisms) extremely important?

Answer 22

they cycle materials through an ecosystem

Question 23

how do microorganisms cycle materials through an ecosystem?

Answer 23

by returning carbon to the atmosphere are carbon dioxide and mineral ions in the soil.

Question 24

what does the water cycle provide?

Answer 24

fresh water for plants and animals on land before draining into the seas

Question 25

water is continuously?

Answer 25

evaporated and precipitated

Question 26

under certain conditions, such as a lack of oxygen, decomposers cannot function effectively. what can this lead to?

Answer 26

dead remains can slowly be converted into fossil fuels

Question 27

large amount of carbon has been trapped underground as ?

Answer 27

fossil fuels

Question 28

combusting fossil fuels (e.g coal and oil) releases?

Answer 28

a large amount of carbon dioxide back to the atmosphere

Question 29

what is water?

Answer 29

an abiotic factor(non living) that affects communities

Question 30

what does energy from the sun cause?

Answer 30

causes the water to evaporate from the surface of the sea

Question 31

the water vapour now travels into air and?

Answer 31

cools down

Question 32

when water vapor cools what happens it condenses it form?

Answer 32

clouds

Question 33

the water in the clouds then falls to the ground as ?

Answer 33

percipitation

Question 34

all forms of precipitation contain?

Answer 34

fresh water, do not contain salt

Question 35

plants take up water in their roots?

Answer 35

water moves up the plant in xylem , and passes out out leaves through stomata as water vapour