Question

Marine scientists are monitoring atmospheric levels of carbon dioxide.

As atmospheric CO2 levels rise, more of the carbon dioxide gas dissolves in the oceans.

As more CO2 dissolves in the ocean, the water become more acidic (lower pH)

Calcium carbonate (CaCO3) dissolves in the acidic water

Marine organisms, such as clams, need CaCO3 to build their exoskeletons.


Based on this information, which change is most likely to be a direct result of these increasing levels of atmospheric and oceanic carbon dioxide?

(1 point)

Frequent rainfall will dilute the effect of the carbon dioxide in the water.

There will be an overpopulation of oysters and other shelled marine species.

The water level will rise and cause floods, damaging coastal ecosystems with contaminated water.

Many species of marine organisms will be weakened, making them unable to produce and maintain their shells.
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Answer 1

Many species of marine organisms will be weakened, making them unable to produce and maintain their shells.

Explanation: Increased CO2 dissolves in seawater to form carbonic acid, lowering pH (ocean acidification). Lower pH dissolves calcium carbonate and makes it harder for organisms like clams and oysters to build and keep their shells.