Water & Carbon Cycles 3 A Level Geography AQA

Which sphere includes the Earth's crust and the uppermost mantle?

• Biosphere

• Hydrosphere

• Lithosphere

• Cryosphere

Carbon is measured in gigatonnes. How many tonnes are in a gigatonne?

• 100

• 10000

• 1 million

• 1 billion

Which terrestrial ecosystem store contains the most carbon?

• Boreal forest

• Wetlands

• Tropical forest

• Tundra

How much carbon is currently stored in the atmosphere?

• 370GtC to 410 GtC

• 450GtC to 580GtC

• 720GtC to 800GtC

• 820GtC to 900GtC

This observatory has been measuring atmospheric carbon since 1958. What is it called?

• Golden Pond Observatory in Kentucky

• Griffith Observatory in California

• Kitt Peak Observatory in Arazona

• Mauna Loa Oberservatory in Hawaii

If more carbon enters a store than leaves it, that store is considered a net..?

• Carbon store

• Carbon sink

• Carbon source

Marine and terrestrial plants turn carbon into organic matter by the process of..?

• Decomposition

• Respiration

• Photosynthesis

• Diffusion

What kind of correlation is there between the temperature of water and the amount of CO2 that can be dissolved?

• Positive

• Negative

• No correlation

When calcium carbonate is heated to produce cement, lime and CO2 are produced. How much CO2 does the cement industry contribute to global anthropogenic CO2 emissions?

• 5%

• 7%

• 10%

• 12%

Which continent produced the largest proportion of agriculture related greenhouse gas outputs (44%), according to the United Nations Food and Agriculture Organisation?

• Africa

• Asia

• Europe

• South America