The Oceans

3. Gases from phytoplankton - more

Worksheet 1

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Can you answer the following questions?

1) Which process removes carbon dioxide (CO₂) from the climate system?

a) CO₂ is broken down by sunlight to form chemicals which do not affect our climate
b) CO₂ reacts with carbonate present in seawater to form hydrogen carbonate
c) CO₂ is removed from the seawater through production of table salt
d) CO₂ dissolves in seawater and makes the water heavy enough to sink into the deep ocean

2) Which of the following biological processes is important for carbon storage in the oceans?

a) digestive processes in oceanic mammals (whales, seals, etc.)
b) uptake of carbon dioxide by fish through their gills
c) phytoplankton photosynthesis
d) decomposition of jelly fish

3) Which of these factors does not affect air-sea gas exchange?

a) water temperature
b) breaking waves
c) radioactivity
d) wind speed

4) The CLAW hypothesis suggests that if the temperature of the Earth rises, phytoplankton in the sea will respond to reduce the temperature. How will they do this?

a) by growing less
b) by producing isoprene
c) by producing more DMS
d) by producing less DMS

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About this page:

authors: Dr. Ellen K. Henriksen and Camilla Schreiner - University of Oslo - Norway
scientific reviewer: Dr. Lucinda Spokes - Environmental Sciences, University of East Anglia, U.K.
quiz programmer: Julia Heres - University of Nürnberg - Germany
last update: 2004-03-27.

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The Oceans

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3. Gases from phytoplankton - more

Worksheet 1

About this page:

authors: Dr. Ellen K. Henriksen and Camilla Schreiner - University of Oslo - Norwayscientific reviewer: Dr. Lucinda Spokes - Environmental Sciences, University of East Anglia, U.K. quiz programmer: Julia Heres - University of Nürnberg - Germanylast update: 2004-03-27.

authors: Dr. Ellen K. Henriksen and Camilla Schreiner - University of Oslo - Norway
scientific reviewer: Dr. Lucinda Spokes - Environmental Sciences, University of East Anglia, U.K.
quiz programmer: Julia Heres - University of Nürnberg - Germany
last update: 2004-03-27.