Activity 4: Energy Flow and Productivity Measurements

Question 1

links together the ecosystem components; ecosystem become self-sustaining thru this; basic to ecosystem functions

Answer 1

Energy

Question 2

source of energy for all living organisms

Answer 2

Sun

Question 3

Sun produces energy through _________

Answer 3

Thermonuclear fission

Question 4

In photosynthesis, ________ (amount of) visible light is utilized

Answer 4

400-700 mm

Question 5

Intensity of radiation at any distance from sun

Answer 5

Solar flux

Question 6

Solar flux is expressed as ______

Answer 6

cal/cm2

Question 7

Amount of energy that reaches ground

Answer 7

Insolation

Question 8

Fraction of light that is reflected by a body or surface; Reflectance back into space

Answer 8

Albedo

Question 9

(SOLAR ENERGY DEPOSITION BETWEEN OUTER ATMOSPHERE AND THE GROUND) ____ reflected by clouds, gasses, dust

Answer 9

42%

Question 10

(SOLAR ENERGY DEPOSITION BETWEEN OUTER ATMOSPHERE AND THE GROUND)
____ absorbed by greenhouse gasses (CO2)

Answer 10

10%

Question 11

(SOLAR ENERGY DEPOSITION BETWEEN OUTER ATMOSPHERE AND THE GROUND)
____ insolation wherein 14% reflected, 1% photosynthesis, and 34% absorbed

Answer 11

48%

Question 12

Movement of energy thru ecosystems in one direction

Answer 12

Energy flow

Question 13

Produce food for themselves and other organisms

Answer 13

Producers / Autotrophs

Question 14

Use sunlight energy for photosynthesis

Answer 14

Photoautotrophs

Question 15

Use energy from chemical compounds for chemosynthesis

Answer 15

Chemoautotrophs

Question 16

Depend on other organisms for food or eats other organisms

Answer 16

Consumers / Heterotrophs

Question 17

Breakdown remains from dead organisms

Answer 17

Decomposers

Question 18

Consume the soft tissues of dead animals

Answer 18

Scavengers

Question 19

Consume detritus (dead leaves, animal feces)

Answer 19

Detritivores

Question 20

Feed any remaining organic matter left by other decomposers

Answer 20

Saprotrophs

Question 21

Shows energy flow in an ecosystem from one trophic level to the next

Answer 21

Energy pyramid

Question 22

The energy in an energy pyramid is measured in _______

Answer 22

units of kilocalories (kcal)

Question 23

If heat is recognized as form of energy, then the total energy of a system plus its surroundings is conserved.

Answer 23

1st Law of Thermodynamics

Question 24

As energy is transferred/transformed, more and more of it is wasted.

Answer 24

2nd Law of Thermodynamics

Question 25

When energy is passed from one trophic level to the next, only 10% of the energy will be passed on.

Answer 25

Rule of 10

Question 26

Position of an organism in a food chain

Answer 26

Trophic level

Question 27

Expressed in terms of light energy utilized or sugar produced

Answer 27

Energy incorporated in living tissue

Question 28

Plant’s energy uptake

Answer 28

Gross Primary Production (GPP)

Question 29

Energy potentially available to heterotrophs

Answer 29

Net Primary Production (NPP)

Question 30

Production carried out by heterotrophs

Answer 30

Secondary production

Question 31

Production carried out by heterotrophs

Answer 31

Secondary production

Question 32

Rate of production of an ecosystem per unit time

Answer 32

Productivity

Question 33

Weight of living organisms

Answer 33

Biomass

Question 34

In aquatic systems, _____ are producers and primary consumers

Answer 34

Plankton

Question 35

Rate of photosynthetic carbon fixation

Answer 35

Primary production

Question 36

The appearance of more bubbles indicates _______

Answer 36

Higher rates of photosynthesis

Question 37

Unidirectional moving

Question 38

• Unidirectional moving through producers (autotrophs) to consumers, and finally to decomposers.
• At each trophic level, some energy is lost as heat due to metabolic processes

Answer 38

Energy flow

Question 39

A cyclic process that moves essntial elements like carbon, nitrogen, and water through biogeochemical cycles

Answer 39

Material cycling