Acid Rain and the pH scale

What does the pH scale measure?

• The acidity of an object

• The temperature of an object

• The weight of an object

• The color of an object

What is the pH value of pure water?

• 7

• 5.5

• 4.0

• 0

What happens to rain when it combines with sulfur dioxide or nitrogen oxides?

• It becomes more acidic

• It becomes more basic

• It becomes neutral

• It evaporates

What is the typical pH value of acid rain?

• 4.0

• 5.0

• 7.0

• 14.0

How much more acidic is rain with a pH of 4.0 compared to a pH of 5.0?

• 10 times more acidic

• 2 times more acidic

• 5 times more acidic

• 20 times more acidic

What color does litmus paper turn if a substance is acidic?

• Red

• Blue

• Green

• Yellow

What is considered a neutral pH value?

• 7

• 0

• 14

• 5