IBDP ESS 2.3 Flows of Energy and Matter

What is not a possible source of energy for food chains?

• Methane lakes in the deep ocean

• The Sun

• Producers

• Outflows of mineral rich water from hydrothermal vents

What fraction of incoming solar radiation reaches the earth's surface?

• 1/4

• 1/2

• 3/4

• 1

What process decreases the amount of energy reaching the Earth's surface?

• reradiation

• reflection

• respiration

• absorption

Pathways of energy through an ecosystem include all except...

• Photosynthesis

• Respiration

• Assimilation

• Denigration

The conversion of energy into biomass through time is called all of these options except...

• Respiration

• Photosynthesis

• Productivity

• Assimilation

NPP =

• GPP+R

• GNP-R

• GPP-R

• GSP-R

GSP=

• NSP-R

• Food eaten+fecal loss

• Fecal loss- foodeaten

• Food eaten-fecal loss

The maximum sustainable yield for a system =

• The highest yield per unit time

• The average yield per unit time

• The highest yield per unit time that can be sustained indefiinitely

• The average yield per unit time that can be sustained indefiinitely

A change of location in an ecosystem is called a

• Flow

• Transfer

• Transformation

• Change of state

The Carbon cycle is an example of a/an...

• Open System

• Closed System

• Isolated System

• Positive Feedback