6 carbon cycle

Question 1

carbon cycle components

Answer 1

➢ The Atmosphere
➢ Land
➢ The Ocean
➢ Rocks and Sediments

Question 2

Amounts of Carbon in the Biosphere (petagram)

Answer 2

rock>soil>water

Question 3

describe The Carbon Cycle

Answer 3

*helps to maintain a balance that prevents all of Earth’s carbon from entering the atmosphere at once or from being stored in rocks entirely to keep the Earth’s temperature relatively stable
*A fast carbon cycle which has relatively rapid exchanges between the ocean, terrestrial ecosystem, and atmosphere
during photosynthesis; A slow carbon cycle which involves longer term exchanges between deep soils, the
deeper ocean, and deeply embedded rocks

Question 4

what is Photosynthesis

Answer 4

*6CO2 + 6H2O=C6H12O6+6O2(a reaction that takes place in
the chloroplasts of green plants)
*A light-dependent phase(chlorophyll pigments in chloroplasts to absorb light) and A light-independent phase

Question 5

describe carbon

Answer 5

*carbon is important because its ability to combine with other elements
*Atmospheric carbon is the most dynamic of the carbon
sources with constant exchanges between the Land and Ocean
*Carbon in the ocean comprises
dissolved organic carbon
Dissolved inorganic carbon(most)
Particulate organic carbon from living and dead biota

Question 6

carbon circle in ocean

Answer 6

*Carbon that enters surface waters is transferred to deeper waters slowly by detritus, sinking to deeper waters, toward the
ocean floor,
*Carbon exchanges between surface waters and
deeper ocean layers occurs relatively slowly because the former is warmer and has lower salinity than the latter which is colder and denser
*in low-latitudes there is a net release of CO2 and in high-latitude regions there is a net uptake

Question 7

what caused increase in ocean acidity

Answer 7

CO2 is dissolved in the ocean to form HCO3- and CO3 2-, Dissolution of the carbonate shells , ending up thinner and more fragile, and a reduction in the rate of CO2 dissolution in the ocean

Question 8

process of CO2 exchange between land and the ocean

Answer 8

through river transport to the coastal ocean,
atmospheric CO2 reacting with water from
precipitation to form carbonic acid (H2CO3), the acid
dissolves rocks by chemical weathering.Calcium ions transported from weathered rocks reacts with bicarbonate ions in the ocean to form calcium carbonate (CaCo3)

Question 9

why the distribution of organic carbon
between living and dead forms of carbon
is also very different on land and in the
sea (ocean)?

Answer 9

because most of autotrophic production in the ocean is either grazed or decomposed in the surface waters with only a fraction transferred into the deeper ocean layers(1:3);
terrestrial autotrophs accumulate large amounts of carbon in long-lived trees(1:300)