Ocean Chemistry

Carbon dioxide (CO₂) enters the ocean from the ______________________________.

• atmosphere

• photosynthesis of aquatic plants and algae

• melting of sea ice

• freezing of seawater

Tags

NGSS.HS-ESS2-6

Density of seawater is affected by these two factors:

• clarity and color

• hydrogen ions and dissolved oxygen

• transparency and turbidity

• temperature and salinity

Tags

NGSS.MS-ESS2-4

Ocean acidification occurs when too much _______________________________ enters the ocean from the atmosphere.

• calcium carbonate

• carbon dioxide

• sulfur dioxide

• nitrogen gas

Tags

NGSS.HS-ESS2-6

The pH of an acidic solution will be...

• Lower then 7

• Above 7

• Exactly 7

Which of these processes causes salinity to increase?

• Precipitation

• Ice melt

• evaporation

• Deep water formation

Which process causes salinity to decrease

• weathering of rocks

• Ice melting

• evaporation

• ice formation

As oceans become deeper, the water pressure ___________________.

• increases
• decreases
• stays the same

What is salinity?

• level of iron in water

• amount of salt in water

• water pressure

• water temperature

How does salinity change with ocean depth?

• deeper water has lower salinity

• surface water has the highest salinity

• deep water has the highest salinity

What major gases are absorbed by the ocean?

• oxygen and nitrogen

• carbon dioxide and hydrogen

• hydrogen and oxygen

• oxygen and carbon dioxide