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Weather Climate Ocean Acidification

Total questions: 20

Worksheet time: 18mins

Name
Class
Date
1.
Ocean acidification begins with 
a)
pollution from ships
b)
carbon dioxide released from combustion
c)
dumping of waste from cities into the ocean
2.
Carbon dioxide and seawater combine to form
a)
calcium carbonate
b)
carbon monoxide
c)
carbonic acid 
3.
Marine organisms make their shells from calcium and
a)
chloride
b)
carbonate
c)
seawater
4.
An example of a marine organism that needs calcium carbonate 
a)
a crab
b)
a shark
c)
an octopus
5.
Very slight increases in the acidity of seawater __________  marine organisms that make shells.
a)
doesn't bother
b)
has no effect on 
c)
is unhealthy and stresses
6.
Carbon dioxide levels in the air have changed throughout earth's history.  The difference today is how ______ the change is happening.
a)
rapidly 
b)
slowly 
c)
wide spread
7.

Which molecule makes water acidic?

a)

Carbonate Ions

b)

Carbon Dioxide

8.

What happens to 1/4 of the greenhouse gases in the atmosphere?

a)

It is released into space.

b)

It gets absorbed by the ocean.

9.

When carbon dioxide ions react with water, what molecules do they release?

a)

Hydrogen Ions

b)

Carbonate Ions

10.

According to this slide

a)

CO2 is causing marine life to die by "poisoning' the water

b)

CO2 is destroying sea shells

c)

CO2 is formed from the combustion of Octane

11.

This image demonstrates that

a)

There is a direct correlation with the atmospheric CO2 and the CO2 in seawater

b)

That pH of the ocean increases as the atmospheric CO2 increases

c)

That there is no correlation between pH of the ocean and atmospheric CO2

12.
As the ocean becomes more acidic, the pH of the water
a)
increases
b)
decreases
13.

What do some marine creatures do with the carbonate ion?

a)

use it as a food source

b)

use it as a defense mechanism

c)

use it to build shells and exoskeletons

d)

use it to cool body temperatures

14.

Ocean acidification makes it more difficult for marine organisms to hear each other, and predators.

a)

True

b)

False

15.

In a more acidic ocean, the shells of organisms do not grow as easily.

a)

True

b)

False

16.

Ocean acidification raises the pH of the ocean .

a)

True

b)

False

17.

Which is carbonate?

a)

HCO-

b)

H2CO3

c)

CO3-

d)

CO2

18.

Which organism might benefit from the increase of carbon dioxide in the world’s oceans?

a)

crabs and lobster

b)

Fishes

c)

Clams and oysters

d)

Sea grasses

19.

All carbon dioxide gas found in the ocean is there because humans are causing pollution from burning fossil fuels.

a)

True

b)

False

20.

CO2 + H20 -->

a)

H2CO3

b)

CO3

c)

CO2

d)

H3O+