Understanding the Carbon Cycle

What are the primary reservoirs of carbon on Earth mentioned in the introduction?

• Limestone, atmosphere, soils, living biomass, black shales

• Oceans, atmosphere, ice caps, deserts

• Volcanoes, glaciers, tundra, savannas

• Mountains, rivers, lakes, forests

What is the primary role of photosynthesis in the carbon cycle?

• To release carbon dioxide into the atmosphere

• To convert carbon dioxide into organic matter

• To decompose organic matter

• To increase atmospheric oxygen levels

How does aerobic respiration contribute to the carbon cycle?

• By releasing carbon dioxide back into the atmosphere

• By increasing the biomass of plants

• By converting oxygen into carbon dioxide

• By storing carbon in long-term reservoirs

What does the Keeling Curve illustrate?

• The decrease in global biodiversity

• The annual rise and fall of global temperatures

• The seasonal fluctuations in atmospheric CO2 levels

• The increase in oceanic salinity

What is the purpose of a box diagram model in the context of the carbon cycle?

• To predict future climate changes

• To calculate the total carbon on Earth

• To represent the relationships and fluxes between carbon reservoirs

• To measure the speed of carbon cycling

What happens to carbon in the soil and marine sediments?

• It remains stored for long periods before cycling back

• It is used by animals for respiration

• It is immediately released back into the atmosphere

• It is converted into fossil fuels

What is the role of consumers in the carbon cycle?

• To consume organic matter and release carbon dioxide through respiration

• To produce carbon dioxide through photosynthesis

• To increase the atmospheric oxygen levels

• To store carbon in long-term reservoirs

What is the primary role of phytoplankton in the marine carbon cycle?

• To increase oceanic temperatures

• To decompose organic matter

• To act as a large carbon reservoir

• To perform photosynthesis and contribute to the marine biological pump

What is the significance of the marine biological pump?

• It increases the ocean's temperature

• It helps in the recycling of nutrients and carbon in the ocean

• It decreases the ocean's salinity

• It prevents the growth of coral reefs

What is the main difference between terrestrial and marine carbon cycles?

• Marine cycles do not involve respiration

• Terrestrial cycles involve large plants, while marine cycles involve microscopic organisms

• Marine cycles occur faster than terrestrial cycles

• Terrestrial cycles do not involve photosynthesis