The role of Oceanic and Terrestrial Photosynthesis-Lesson 5

Question 1

What are terrestrial ecosystems?

Answer 1

These are ecosystems on the land such as forests, grasslands and Tundra

Question 2

Give the equation for photosynthesis

Answer 2

Water+C02 =Sugar+Oxygen

Question 3

Give the equation for photosynthesis

Answer 3

Sugar+Oxygen=Energy+Water+C02

Question 4

How does the process of respiration balance photosynthesis?

Answer 4

It produces energy when combining oxygen with the Carbohydrate and releasing Carbon dioxide and water

Question 5

How does phytoplankton in the ocean sequester C02?

Answer 5

They sequester carbon dioxide through photosynthesis by pumping it out of the atmosphere into the ocean store

Question 6

What is the biological carbon pump?

Answer 6

This is where phytoplankton sequesters carbon dioxide by pumping it out of the atmosphere and into the ocean store

Question 7

How much gt of C02 a year does terrestrial photosynthesis allow plants to sequester?

Answer 7

100-120 Gt of Carbon per

Question 8

What % of solar insulation reaching Earth is captured by Photosynthesis?

Answer 8

about 1%

Question 9

Which biome has the most global productivity?

Answer 9

Tropical rainforests

Question 10

What is NPP the measure of? (Net Primary Production)

Answer 10

It is a measure of the rate carbon is stored as biomass in a year minus losses from respiration

-Total amount of C02 fixed by plants in one year

Question 11

When does highest productivity occur on land?

Answer 11

In areas that are warm and wet

Question 12

Which biome stores the most amount of Carbon?

Answer 12

Tropical rainforests

Question 13

What does soil health depend on?

Answer 13

It depends on the amount of organic carbon stored in the soil

Question 14

How is soil storage amount determined?

Answer 14

By the balance of its inputs and its outputs

Question 15

What characteristics does Carbon give to soil?

Answer 15

its water retention capacity, its structure and its fertility

Question 16

Why is soil erosion a major threat to carbon storage and soil health?

Answer 16

This is because organic carbon is concentrated in the surface soil layer as easily eroded small particles

Question 17

How does Winter’s organic decay affect the amount of C02 in soils?

Answer 17

In the Northern hemisphere, Winter’s organic decay increases the amount of C02 in soils

Question 18

What will happen to C02 levels if winters become shorter?

Answer 18

It’s possible that less C02 will be released, or climate change will trigger a natural response and that more C02 will be absorbed therefore altering the balance