Ocean Chemistry

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

Increased carbon dioxide in the oceans causes.....

• animals to overproduce shells

• sea creatures to release too much oxygen

• a decrease in shell production for sea creatures

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

What is the average salinity of the ocean?

• 3.5%

• 6.5%

• 10%

• 1%

Where do oceans have the lowest salinity?

• along the ocean floor

• at the equator

• on the north pole

• where rivers flow into the ocean

Carbon dioxide and seawater combine to form

• calcium carbonate
• carbon monoxide
• carbonic acid 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Marine organisms make their shells from calcium and

• chloride
• carbonate
• seawater

Tags

NGSS.MS-LS2-3

NGSS.MS-PS1-1

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

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

Tags

NGSS.HS-LS2-6

NGSS.HS-LS4-5