Question

level 5
q3
what effect do volcanic eruptions have on
the carbon cycle?
a. they remove co₂
from the atmosphere
b. they add co₂ to
the atmosphere
c. they add co₂ to
the lithosphere
d. they have no impact on the carbon cycle

Explanation:

Volcanic eruptions release carbon - containing gases, mainly carbon dioxide ($\ce{CO_2}$), into the atmosphere. Option A is wrong because volcanoes don't remove $\ce{CO_2}$ from the atmosphere. Option C is incorrect as they add $\ce{CO_2}$ to the atmosphere, not the lithosphere. Option D is wrong since they do impact the carbon cycle. So the correct option is B.

Answer:

B. They add $\ce{CO_2}$ to the atmosphere