ESS - Topic 2.3 - Flows of energy matter

Approximately how much of the incoming solar radiation hitting the planet is absorbed by the earth's surface?

• 70%

• 30%

• 50%

• 10%

Approximately how much of the incoming solar radiation hitting the planet is reflected out into space again?

• 1%

• 20%

• 30%

• 10%

Which substances are needed to produce organic matter by photosynthesis?

• Oxygen and Carbon dioxide

• Carbon dioxide and water

• Oxygen and water

• Sugards and carbon dioxide

What is the source of energy for this rainforest ecosystem?

• The equator

• Soil

• Sun

• Sugards and carbon dioxideChemosynthetic bacteria

Which of the following is/are needed to calculate gross primary productivity:

I. Energy fixed by photosynthesis

II. Energy lost by respiration

III. The biomass gained by heterotrophic organisms

• I and II

• I only

• III only

• II only

The correct formula to calculate efficiency is...?

• (original value - new value) / original value x 100%

• original value / new value x 100%

• (new value - original value) / new value x 100%

• new value / original value x 100%

Which productivity equation is correct?

• NP = GP - R

• GP = NP + R - faecal loss (waste)

• NP = GP + R

Approximately how much of incoming solar radiation that reaches the ground is photosynthesized by producers?

• 1%

• 99%

• 5%

• 10%

Net Primary Production represents the energy ...

• captured by photosynthesis in producers in an ecosystem, minus losses due to respiration

• captured by photosynthesis in producers in an ecosystem

• captured by herbivores in an ecosystem, minus losses due to respiration

• captured by herbivores in an ecosystem

What is secondary productivity?

• A definition of secondary productivity is the absorption gained by consumers through feeding and biomass

• A definition of secondary productivity is the feeding gained by biomass through feeding and absorption

• A definition of secondary productivity is the biomass gained by consumers through feeding and absorption