The Sulfur Cycle

Why is sulfur important to organisms?

• To make DNA, RNA and ATP.

• To make amino acids and proteins.

• To make carbohydrates.

• To make fats.

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NGSS.HS-LS1-6

What are 2 sources of hydrogen sulfide?

• Burning of fossil fuels.

• Breakdown of sulfates by bacteria.

• Volcanic emissions.

• Animals eating plants.

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

• Hydrogen sulfide

• Sulfuric acid

• Nitrogen oxides

• Sulfur dioxide

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NGSS.HS-PS1-2

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

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NGSS.HS-LS2-3

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

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NGSS.HS-ESS3-1

Which of the following gases contribute to acid rain, when they dissolve in rain water? Choose all that apply.

• Oxygen

• Sulfur oxides

• Helium

• Nitrogen oxides

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NGSS.MS-PS1-2

What are some sources of sulfur dioxide in the air? Choose all that apply

• when phosphate goes through mineralization

• burning of fossil fuels

• when dimethyl sulfide emitted from marine algae reacts with oxygen in the air

• when hydrogen sulfide emitted by volcanoes reacts with oxygen in the air

What is formed when sulfur dioxide reacts with oxygen in the air?

• ammonium sulfate

• hydrogen sulfide

• sulfur trioxide

• sulfuric acid

Tags

NGSS.HS-PS1-2

What dissolves in rain water to form sulfuric acid, which contributes to acid rain?

• nitrogen dioxide

• sulfur trioxide

• carbon dioxide

• sulfur dioxide

Tags

NGSS.HS-PS1-2

What are some effects of acid rain? Choose all that apply.

• It leaches toxic minerals from the soil into waterways

• It corrodes metal and carbonate statues

• It can cause death to plants and aquatic organisms

• It contributes to the melting of ice caps, leading to sea level rise

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NGSS.HS-ESS2-5

NGSS.HS-LS2-6