Energy Transfer

Question 1

food chain

Answer 1

a path of food consumption in an ecosystem

Question 2

Trophic levels

Answer 2

each level of consumption in a food chain

Question 3

Food web

Answer 3

interconnected food chains

Question 4

Gross production

Answer 4

total energy acquired at each level

Question 5

Net production

Answer 5

energy left after respiration and activities

Question 6

Net production is only a fraction of ………….

Answer 6

gross production

Question 7

Organisms expend energy to ……….

Answer 7

stay alive

Question 8

The different between net production and gross production is greater for ………. than ………..

Answer 8

consumers;producers

Question 9

Conversion efficiency

Answer 9

the ration of net production at one trophic level to the net production of the higher level

Question 10

Average conversion efficiency from producers to primary consumers

Answer 10

10%

Question 11

Average conversion efficiency from herbivores to carnivores

Answer 11

1%-5%

Question 12

Pyramid of energy

Answer 12

the decrease in total energy at each trophic level

Question 13

Pyramid of numbers

Answer 13

the number of individuals at each tropic level

Question 14

Entropy

Answer 14

a measure of randomness or disorder in a system

Question 15

Some energy must be expended as ……..

Answer 15

waste heat

Question 16

Waste heat limits the amount…..

Answer 16

of work a system can do

Question 17

Moving through tropic levels from base to top; entropy always…… and biomass generally……

Answer 17

increases;decreases

Question 18

Energy is …… as we move though the tropic levels

Answer 18

lost

Question 19

What is the percentage of energy that is used for process or lost as waste heat

Answer 19

80-90%

Question 20

What is the percentage of energy that is passed to the next organisms in a food web

Answer 20

10-20%

Question 21

Trophic dynamics

Answer 21

system of tropic levels

describes an organism’s food chain position