B4

Question 1

Why is recycling nutrients important for all living organisms?

Answer 1

It provides the nutrients that living organisms use to grow and reproduce

Question 2

Which organisms decompose dead organic matter?

Answer 2

bacteria
fungi

Question 3

Why is it important that there is carbon dioxide in the atmosphere?

Answer 3

Carbon dioxide is needed for photosynthesis in plants

Question 4

Which three processes in the carbon cycle release carbon dioxide into the atmosphere?

Answer 4

-combustion
-decomposition
-respiration

Question 5

explain the water cycle:

Answer 5

Water from lakes, rivers, oceans, and the soil, evaporates into water vapour, and rises into the atmosphere.
Water can also evaporate from plants in a process called transpiration.
As the water vapour accumulates it can condense to form clouds.
Later, the water will fall as rain, which we call precipitation.
The water will then seep into the soil, flow into rivers or lakes, and be taken up by plants.
The whole cycle then repeats over and over.

Question 6

Which carbon-containing compound do plants produce during photosynthesis?

Answer 6

glucose

Question 7

what is competition?

Answer 7

interaction between organisms or species in which they both try to use the same limited resources.

Question 8

what is an ecosystem?

Answer 8

interaction of a community of living organisms (biotic) with the non-living (abiotic) parts of their environment.

Question 9

what is a biotic factor what is an a-biotic factor?

Answer 9

biotic- environment- living factors
abiotic- non environment- non living factors

Question 10

what is interdependance?

Answer 10

organisms in an ecosystem which depend on each other

Question 11

what is the type of relationship where one organism harms another?

Answer 11

parastitic relationship

Question 12

True or false? A community includes all of the different populations in a region.

Answer 12

A community includes all the organisms of all the populations present at the same time.

Question 13

what is a population? a

Answer 13

all of the organisms of one species in a habitat

Question 14

what is a community?

Answer 14

all the organisms of different species living in a habitat

Question 15

what is an ecosystem?

Answer 15

a community of organisms along with the biotic and abiotic factors

Question 16

explain the carbon cycle:

Answer 16

-plants take in CO2 from the atmosphere
-animals eat these plants and then excrete them, which CO2 is released in the decay
-fossil fuels made of animal decay and matter is also burned as a source of energy and Co2 is released back into the atmosphere
-carbon compound in the soil is also decomposed by micro-organisms which also releases CO2 back into the atmosphere

Question 17

how is carbon inside carbohydrates released back into the atmosphere?

Answer 17

respiration

Question 18

what do ecosystems include?

Answer 18

biotic and abiotic factors

Question 19

what are biotic factors?

Answer 19

the living parts of the ecosystem

Question 20

what are the abiotic factors?

Answer 20

the non living parts of the ecosystem

Question 21

what is predetition?

Answer 21

when one organism kills another organism for food

Question 22

what are prey?

Answer 22

animals that are eaten

Question 23

what is parasitism?

Answer 23

when one organism lives inside of another organism and the parasite benefits from the relationship but the host does not benefit from the relationship

Question 24

what is mutualism?

Answer 24

where both organisms benefit from the relationship

Question 25

how is carbon from dead leaves made available to plants?

Answer 25

the dead plant leaves are decomposed by micro-organisms- these micro-organisms then respire which releases carbon dioxide into the atmosphere

Question 26

Name the gas produced by the anaerobic decay of organic material.

Answer 26

methane