Carbon dating animation
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Some of the smallest shell-builders transport the most carbon down to seafloor sediments.
Microscopic shell-building unicelluar coccolithophores mostly microscopic, unicellular amoeboid protists that live in the ocean; produce shells of organic material, sediment grains, or calcium carbonate; can be found in just about every marine environment from the deep sea to shallow reefs, buried in sediment or floating in the water column.
Eventually, tectonic processes of high heat and pressure transform these sediments into limestone.
If you examined a sample of sediments from these cliffs, you would find shells of microscopic coccolithophores and foraminifera that lived, died and then sank to the sea floor millions of years ago. Choose two of the following and describe their role in the ocean's biological pump.
Over time, these sediment layers such as the White Cliffs of Dover eventually return carbon to the oceans by weathering and erosion. · phytoplankton · food webs · microbes · zooplankton · shells 4.
How are marine phytoplankton and forests similar in their role in the carbon cycle?
occurs when surface waters converge (come together), pushing the surface water downwards; regions of low primary productivity because nutrients get used up and are not continuously resupplied by the cold, nutrient-rich water from below the surface..
Upwelling currents occur when surface waters diverge (move apart), enabling upward movement of water; bring water to the surface that is enriched with nutrients important for primary productivity (phytoplankton growth) that in turn supports richly productive marine ecosystems. Downwelling and upwelling currents are important components of the deep ocean conveyor belt and are important in physcially transporting carbon compounds to different parts of the oceans.