W15D5 Test Ocean Acidification

According to the National Oceanographic and Atmospheric Administration (NOAA), what is the average pH of the ocean?

• 6.1

• 7.0

• 8.1

• 9.2

Tags

NGSS.HS-ESS2-5

NGSS.HS-ESS2-6

According to the National Oceanographic and Atmospheric Administration (NOAA), the average pH of the ocean is 8.1, which means the ocean is...

• acidic

• basic

• neutral

Tags

NGSS.HS-ESS2-5

Look at the graph. The ocean is ​ getting ​ (a)   acidic as ​CO2 is going ​ (b)   .

• more
• up
• less
• down

Tags

NGSS.HS-ESS2-6

NGSS.HS-ESS3-5

The graph shows that the pH is going down, which means that there are more and more ​ (a)   ions in solution.

• H+
• OH-

Shellfish shells are made of the same thing that limestone and eggshells are made of: ​ (a)  

• Calcium Carbonate (CaC03)
• Hydrogen ions (H+)
• Hydroxide Ions OH-
• Carbonate Ions (CO32-)

Tags

NGSS.HS-ESS2-6

NGSS.HS-PS1-2

Shell-building sea creatures like crabs, oysters, and muscles, build their shells by taking ​ (a)   out of the sea water and combining it with ​ (b)   to make ​ (c)   .

• carbonate ions (CO32-)
• calcium ions (Ca+2)
• calcium carbonate (CaCO3)

Tags

NGSS.HS-PS1-2

The carbonate ion (CO32-) has ​ (a)   carbon, ​ (b)   oxygens, and a - ​ (c)   charge.

• 1
• 3
• 2

Tags

NGSS.HS-ESS2-6

Shellfish shells are made of the same thing that limestone and eggshells are made of ​ Calcium Carbonate (CaC03). They take ​ (a)   and ​ (b)   from seawater to make it.

• Calcium ions (Ca2+)
• Carbonate Ions (CO32-)
• Hydrogen ions (H+)
• Hydroxide Ions OH-

Tags

NGSS.HS-PS1-2

The calcium ion (Ca2+) has a + ​ (a)   charge.

• 2
• 1
• 3

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

CO2 reacts with water to make ​ (a)  

• carbonic acid (H2CO3)
• calcium carbonate (CaCO3)
• calcium ion (Ca2+)
• carbonate ion (CO32-)

Tags

NGSS.HS-ESS2-6

NGSS.HS-PS1-2