The Carbon Cycle | Earth Science | Quiz

Carbon is a common component of

limestone

all organisms

volcanic gases

all of the choices
The geologic portion of the carbon cycle operates on a scale of days to months.

true

false
Photosynthesis is the process by which plants

release CO₂ to the atmosphere.

turn CO₂ into sugars.

turn sugars into energy.

none of the choices
Respiration is the process by which ____________ is consumed and _______________ is produced.

carbon dioxide, oxygen

carbon dioxide, energy

oxygen, carbon dioxide

energy, carbon dioxide
Regular, annual fluctuations in atmospheric carbon dioxide concentrations occur because

photosynthesis stops at night while respiration continues

humans influence the carbon dioxide concentrations.

carbon dioxide emissions increase in the winter.

plants in the northern hemisphere lose their leaves during the winter.
How does the concentration of carbon dioxide in the atmosphere affect climate?

As carbon dioxide concentration increase, temperatures decrease.

As carbon dioxide concentrations increase, temperatures increase.

Carbon dioxide concentrations have no affect on climate.

As carbon dioxide concentrations increase, temperatures become more random.
According to most scientists, activities like fossil fuel burning and deforestation have affected the global carbon cycle.

true

false
Which of the following processes does NOT add carbon to the atmosphere?

volcanic eruptions

respiration

weathering of limestone

subduction
Although direct measurements of atmospheric carbon dioxide have only been taken consistently since the 1950s, scientists have been able to retrieve data from the past 500,000 years. They have been able to do this by looking at

ice cores from ice sheets

sediment cores from the ocean

tree rings

all of the choices
A net carbon source is a carbon pool which takes in more carbon than it releases.

true

false