1.4 pH and the Carbonate Cycle

pH measures the

• Salinity of the water

• the concentration of hydrogen ions in the water

• The Dissolved oxygen in the water

• the concentration of carbonate in the water

Tags

NGSS.MS-PS1-2

A solution with a pH of 3 would be considered

• Acidic

• Alkaline

• neutral

A solution with a pH of 8 would be considered

• Acidic

• Alkaline

• neutral

A substance that reduces the tendency of a solution to become too acidic or alkaline is called a  

• Polar compound

• Buffer

• Reduction reagent

• Isotope

Pure water has a pH of

• 5.2

• 6.3

• 7

• 8.3

Ocean water has a pH of

• 5.6

• 6.2

• 7

• 8.2

Carbon dioxide combines with water to form

• Carbonic Acid

• Calcium Carbonate

• Hydrogen Sulfide

• Dissolved Oxygen

Tags

NGSS.MS-PS1-2

Increased amount of Carbon dioxide dissolving into the ocean from the atmosphere can cause

• the pH of seawater to become more alkaline

• the pH of seawater to become more acidic

• corals to grow stronger skeletons

• plankton to flurish

Tags

NGSS.MS-LS1-5

Which of the following describes why the pH of the ocean decreases in the middle depths as seen in this pH/depth profile.

• There is more photosynthesis than respiration

• There is more carbon dioxide present from respiration and less photosynthesis

• There is less respiration and less photosynthesis

• less Carbon dioxide is available so far from the surface

Tags

NGSS.MS-LS2-3

Carbon dioxide in surface waters is produced by

• photosynthesis

• deposition

• bioluminescence

• Respiration

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-5