Sulfur Cycle

Question 1

• Chemical Element: Symbol S, atomic number 16
• Appearance: Yellow, brittle solid at room temperature
• Smell: Associated with rotten eggs (due to hydrogen sulfide gas)
• Natural Occurrence: Found in volcanic areas, hot springs, and minerals like pyrite and gypsum

Answer 1

Sulfur

Question 2

What is the symbol of sulfur ?

Answer 2

S

Question 3

What are the symbol of sulfuric acid ?

Answer 3

(H2SO4)

Question 4

• Sulfur dioxide (SO2) is released into the air from volcanic eruptions, burning fossil fuels, and decaying organic matter.
• It reacts with water to form sulfuric acid (H2SO4), which falls as acid rain.

Answer 4

ATMOSPHERIC SULFUR

Question 5

Acid rain and dust bring sulfur compounds to the soil and water.

Answer 5

DEPOSITION TO EARTH

Question 6

What is the symbol of sulfate ions ?

Answer 6

(SO42-)
note: small 4 down
small 2 upper

Question 7

• Plants absorb sulfate ions
(SO42-) from the soil to build proteins.
• Microorganisms convert sulfur into forms that plants can use.

Answer 7

ABSORPTION BY PLANTS AND MICROORGANISMS

Question 8

• Animals get sulfur by eating plants or other animals.
• Sulfur is used in proteins and vitamins like biotin and thiamine.

Answer 8

CONSUMPTION BY ANIMALS

Question 9

• Dead plants and animals decompose, returning sulfur to the soil.
• Bacteria break down sulfur compounds, releasing hydrogen sulfide (HS) into the air.

Answer 9

DECOMPOSITION AND RELEASE

Question 10

What are the symbol of hydrogen sulfide?

Answer 10

H2S
note: snall 2 down

Question 11

Special bacteria convert (H2S) hydrogen sulfide back into Sulfur dioxide (SO2), restarting the cycle.

Answer 11

BACTERIAL CONVERSION:

Question 12

The sulfur cycle is vital for ecosystems and environmental balance:
• Nutrient Cycling: Ensures sulfur is available for plant and animal growth, essential for proteins.
• Acid Rain: Helps understand and manage acid rain caused by sulfur dioxide emissions.
• Geological Processes: Regulates rock weathering and mineral formation.
• Climate Impact: Influences cloud formation and global temperatures.
• Human Activities: Helps address pollution from fossil fuels and industrial emissions.

Answer 12

True

Question 13

HOW DOES SULFUR CYCLE WORKS?

Answer 13

1. ATMOSPHERIC SULFUR
2. DEPOSITION TO EARTH
3. ABSORPTION BY PLANTS AND MICROORGANISMS
4. CONSUMPTION BY ANIMALS
5. DECOMPOSITION AND RELEASE
6. BACTERIAL CONVERSION

Question 14

What ave the symbols atomic number of sulfur

Answer 14

S
16