Energy Transfers & Nutrient Cycles

Question 1

What is biomass?

Answer 1

Mass of carbon/dry mass tissue per given volume

Question 2

Difference between fresh and dry mass? (5)

Answer 2

Question 3

What is the purpose of the following equipment choices in a bomb calorimeter?
- Stirrer
- Thermometer
- Insulated Container

Answer 3

Stirrer - To distribute the heat
Thermometer - Measure temp. to calc. energy released from burnt biomass
Insulated Container - So heat energy isn’t lost to the surroundings

Question 4

Where is energy lost from sun to producer? (4)

Answer 4

Question 5

What is the equation for GPP? What does this mean?

Answer 5

Question 6

What is NPP available for?

Answer 6

Question 7

How is the net production of consumers calculated?

Answer 7

Question 8

Where is energy lost from producer to primary consumer? (4)

Answer 8

Question 9

How to calculate efficiency going up trophic levels?

Question 10

How to calculate efficiency going down trophic levels?

Question 11

Answer 11

Question 12

Answer 12

Question 13

How can energy conservation rate by increased? Why?(4)

Answer 13

• Restrict movement so less respiratory loss due to less muscle contraction
• Keeping animals indoors + keep warm to reduce heat loss
• Feeding being more nutritious as food source is easier to absorb reducing energy lost by egestion
• Slaughtered before reaching adulthood so more energy transferred to biomass

Question 14

Answer 14

Question 15

What happens in the Phosphorous cycle? (7)

Answer 15

Question 16

How do mycorrhizae benefit plants? (3)

Answer 16

Question 17

Answer 17

Question 18

Answer 18

Question 19

Answer 19

Question 20

Answer 20