Algae Cycle

Question 1

1. Photosynthesis: phytoplankton photosynthesize in the ocean’s sunlit surface waters, using dissolved _

Answer 1

Atmospheric CO2

Question 2

1. Photosynthesis: Phytoplankton are primary producers in the _

Answer 2

Food chain

Question 3

Ocean plays part in world’s carbon cycle are are biggest global store of _

Answer 3

Carbon

Question 4

In phenomenon called the carbon pump, phytoplankton extract CO2 from atmosphere and use it for _ (2)

Answer 4

Metabolism

To make organic compounds

Question 5

Even small changes in carbon pump can affect _ and therefore climate

Answer 5

Atmospheric CO2

Question 6

Atmospheric CO2 dissolves in water and some is _

Answer 6

Released from ocean into atmosphere

Question 7

Oxygen produced by _ is released into atmosphere

Answer 7

Algal photosynthesis

Question 8

Nutrient runoff from land (farming) may stimulate excessive algal growth, leading to _

Answer 8

Toxic blooms

Question 9

2. Carbon uptake: Carbon passes up food chain, phytoplankton consume zooplankton, _ consume zooplankton, etc.

Answer 9

Fish

Question 10

Some CO2 stored in seawater as dissolved _

Answer 10

Co2

Question 11

Carbon not used in _ dissolves

Answer 11

Photosynthesis

Question 12

3. Decomposition: marine organisms die, sink to seabed and decomposed by _

Answer 12

Bacteria

Question 13

3. Decomposition: bacteria respiration releases carbon stored in their bodies as _

Answer 13

Co2

Question 14

Some carbon remains stored in deep ocean and _

Answer 14

Seabed

Question 15

4. Upwelling: co2 and nutrients from decomposition are cycled back up to surface water by _

Answer 15

Upward currents

Question 16

4. Upwelling: upward currents or cold, nutrient-rich water called _

Answer 16

Upwellings

Question 17

4. Upwelling: some co2 is released back up into

Answer 17

Atmosphere