Carbon Cycle Unit Test (Progress Learning)
Photosynthesis and cellular respiration are two major processes of carbon cycling in living organisms. Which statement correctly describes one similarity between photosynthesis and cellular respiration?
Both include reactions that transform energy.
The portion of Earth that supports all life is called the:
biosphere
Which is considered the largest carbon reservoir?
geosphere/lithosphere
A changing climate has strong implications for biodiversity. Studies of fossil and pollen distribution show that species are very sensitive to climate changes. When the climate changes, species often die out in their present areas and colonize new areas. Therefore, as the climate changes in the future, there will be disruption of natural communities and extinction of populations and species. Which of these environmental changes would most affect the arctic polar bears survival?
global warming
Which part of the environment incorporates carbon into the carbon cycle via water?
hydrosphere
Which one of the following is the largest source of greenhouse gases in the atmosphere?
the burning of fossil fuels
Certain gases trap the sun's energy and results in an increase in atmospheric temperatures. This is known as:
the greenhouse effect
Carbon is a major component of all organic compounds, including carbohydrates, lipids, proteins, and nucleic acids. Carbon dioxide is continually exchanged between the atmosphere and oceans. What geological process returns carbon to the atmosphere in the form of carbon dioxide?
volcanic activity
Which process transfers carbon from the atmosphere to the biosphere?
photosynthesis
Carbon dioxide is returned to the atmosphere primarily by the
respiration of consumers.
What role do oceans play in the carbon cycle?
Their phytoplankton are a major sink for CO2
What is the world's largest carbon sink?
oceans
Which of the following options likely leads to regular, annual fluctuations (changes) in the amount of carbon dioxide in the atmosphere?
plants in the northern hemisphere lose their leaves in the fall/winter
Photosynthetic organisms help to prevent global warming by:
releasing oxygen into the atmosphere/storing carbon
