Bài 6 sulfur và sulfur dioxide

What is directly formed when the sulfur in coal is burned?

• Hydrogen sulfide

• Sulfuric acid

• Nitrogen oxides

• Sulfur dioxide

How does sulfur return to the soil? Choose all that apply.

• Dry deposition of ammonium sulfate

• Wet deposition of sulfuric acid

• Humans add fertilizers containing sulfates to the soil

• Decomposition of dead plants and animals

How do humans affect the sulfur cycle? Choose all that apply.

• Using fertilizers containing sulfate

• Dumping plastic in the ocean

• Burning fossil fuels, especially coal

• Mining of sulfur

What color is mineral sulfur?

• Lime green

• Greenish Yellow

• Cyan

• White

When Sulfur is oxidized in the air, is converted into

• Sulfides

• Sulphates

• Sulfur ions

What are 2 sources of hydrogen sulfide?

• Burning of fossil fuels.

• Breakdown of sulfates by bacteria.

• Volcanic emissions.

• Animals eating plants.

Sulfur helps us do what in our bodies?

• Digest food

• Keep nails and skin rigid and strong

• Maintain healthy ligaments

• Provide energy

How does too much sulfur in the atmosphere affect lakes and oceans?

• Lowers the pH

• Raises the pH

• Has no effect

What are some negative effects of acid rain?

• Damages buildings

• Harms aquatic organisms

• Starts fires

• Melts roads

Sulfur can be added to the atmosphere by

• burning coal, oil and gasoline
• respiration
• nitrogen fixing bacteria
• decomposition