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U7L3E1: Modeling Ocean Acidification

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.

What does pH measure (hint: there are two correct answers)?

a)

The acidity of a solution

b)

The amount of water in a solution

c)

How reactive a solution is

d)

How many extra hydrogen ions there are in a solution

2.

On the pH scale, 0-6 is ___________, 7 is ____________, and 8-10 is _______________

a)

Acid; Base; Non-reactive

b)

Base; Neutral; Acid

c)

Acid; Neutral; Base

d)

Acid; Base; Acid

3.

As the amount of CO2 in the atmosphere/oceans increases, the acidity of the ocean _____________.

a)

Decreases

b)

Increases

4.

As the amount of CO2 in the atmosphere/oceans increases, the pH of the ocean _____________.

a)

Decreases

b)

Increases

5.

What molecule in the ocean is needed to make sea shells and can be negatively affected by carbonic acid (acid made from water and co2)?

a)

Carbonate (CO3)

b)

Oxygen (O2)

c)

Hydrogen (H)

d)

Carbon dioxide (CO2)

6.

What happens when Carbonate (CO3) becomes less available?

a)

Sea levels rise

b)

Animals with shells may die because they can't make shells

c)

The pH of the ocean increases

d)

Ocean temperatures increase

7.
Ocean acidification begins with 
a)
pollution from ships
b)
carbon dioxide released from combustion
c)
dumping of waste from cities into the ocean
8.
Carbon dioxide and seawater combine to form
a)
calcium carbonate
b)
carbon monoxide
c)
carbonic acid 
9.
Marine organisms make their shells from calcium and
a)
chloride
b)
carbonate
c)
seawater
10.
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