Ocean Acidification

Carbon dioxide and seawater combine to form

• calcium carbonate
• carbon monoxide
• carbonic acid 

Tags

NGSS.MS-PS1-2

Marine organisms make their shells from calcium and

• chloride
• carbonate
• seawater

Tags

NGSS.MS-PS1-1

An example of a marine organism that needs calcium carbonate 

• a crab
• a shark
• an octopus

Tags

NGSS.MS-LS2-1

Which molecule makes water acidic?

• Carbonate Ions

• Carbon Dioxide

Tags

NGSS.HS-PS1-2

As the ocean becomes more acidic, the pH of the water

• increases
• decreases

What do some marine creatures do with the carbonate ion?

• use it as a food source

• use it as a defense mechanism

• use it to build shells and exoskeletons

• use it to cool body temperatures

The H+ ion is a(n)

• acid
• base
• neutral

A(n) ______ is a substance with a pH less than 7

• Acid
• Alkaline
• Base
• Buffer

A(n) _______ is a substance with a pH greater than 7.

• Base
• Acid
• Buffer
• Water

Complete the sentence.
A substance that is more basic has a _____ pH than a substance that is acidic.

• lower
• higher
• the same
• none of the above