The shells of many marine creatures are made from calcium carbonate.Explain why these shells will start to dissolve if the ocean becomes too acidic.

The phenomenon being discussed that affects the shells of organisms is oceanacidification. Based on what you know about pH, do you think “acidification” refers to adecrease in pH or an increase in pH? Explain2. Why do you think that this drop in pH occurred after the Industrial Revolution?3. Explain how more carbon dioxide in the atmosphere can cause the pH of the ocean todecrease.4. Based on what you know about chemical equilibrium, what would have to occur for theacidification of the oceans to be reversed? Explain your answer.Directions: Answer each “reflection” question when it appears at the bottom of a lessonpage.

Remember what creatures need in order to grow shells and hard structures. Calcium ionsCarbon dioxideHydrogen ionsCarbonate ions and calcium ions

dissolves in water and increases the water acidity. Acidic water hinders corals' ability to build a

Human activities have caused the concentration of CO₂ in the atmosphere and the ocean to increase, resulting in global warming and changes to ocean chemistry. Why are ocean animals with shells particularly vulnerable to increasing CO₂ concentrations?It gets too hot under the shell compared to the surrounding environmentShells fall apart at higher temperaturesCO₂ makes the ocean more acidic, affecting an animal’s ability to build its shell

Limestone, chalk and marble are different forms of calcium carbonate.All metal carbonates and hydrogencarbonates react with acids to give a corresponding1 point(a)carbonate, water and co2(b)salt,co2 and water(c)hydrogen, water and salt(d)salt and water only