U7L3E1: Modeling Ocean Acidification

What does pH measure (hint: there are two correct answers)?

• The acidity of a solution

• The amount of water in a solution

• How reactive a solution is

• How many extra hydrogen ions there are in a solution

On the pH scale, 0-6 is ___________, 7 is ____________, and 8-10 is _______________

• Acid; Base; Non-reactive

• Base; Neutral; Acid

• Acid; Neutral; Base

• Acid; Base; Acid

As the amount of CO2 in the atmosphere/oceans increases, the acidity of the ocean _____________.

• Decreases

• Increases

As the amount of CO2 in the atmosphere/oceans increases, the pH of the ocean _____________.

• Decreases

• Increases

What molecule in the ocean is needed to make sea shells and can be negatively affected by carbonic acid (acid made from water and co2)?

• Carbonate (CO3)

• Oxygen (O2)

• Hydrogen (H)

• Carbon dioxide (CO2)

What happens when Carbonate (CO3) becomes less available?

• Sea levels rise

• Animals with shells may die because they can't make shells

• The pH of the ocean increases

• Ocean temperatures increase

Ocean acidification begins with 

• pollution from ships
• carbon dioxide released from combustion
• dumping of waste from cities into the ocean

Carbon dioxide and seawater combine to form

• calcium carbonate
• carbon monoxide
• carbonic acid 

Marine organisms make their shells from calcium and

• chloride
• carbonate
• seawater

Very slight increases in the acidity of seawater __________  marine organisms that make shells.

• doesn't bother
• has no effect on 
• is unhealthy and stresses