C
Gas released by volcanoes, decomposition of organic molecules, and burning of fossil fuels.
Sulfur dioxide
This process releases sulfates into the soil from rocks.
Weathering
Besides runoff from land, sulfur enters the ocean from these geological features.
underwater geothermal vents
Burning fossil fuels, especially this, releases large amounts of sulfur dioxide and hydrogen sulfide gas.
coal
Sulfur is an essential element for the __________ of living systems.
macromolecules
Human activity that contributes to atmospheric sulfur dioxide.
Burning of fossil fuels
Terrestrial ecosystems obtain these from the soil, incorporating sulfur into the food web.
Soil sulfates
In what form does sulfur support marine ecosystems?
sulfates
This environmental problem is created when rain falls through sulfur dioxide gas.
Acid rain
Sulfur is a component of this amino acid, involved in protein formation.
cysteine
Phenomenon caused by rainwater falling to the ground through sulfur dioxide gas.
Acid rain
Sulfur-containing rocks originate from these, which are moved to land by geologic uplifting.
Ocean sediments
What are the three ways sulfur enters the ocean?
runoff from land, atmospheric fallout, and underwater geothermal vents
Acid rain causes chemical degradation to these man-made structures.
Buildings
What is the chemical formula for sulfur dioxide?
SO₂
Chemical formula for the gas released when plants decompose and die, returning sulfur to the atmosphere.
H₂S
Give the chemical formula of soil sulfates.
SO₄²⁻
Some marine ecosystems rely on these organisms that use sulfur as a biological energy source.
chemoautotrophs
Besides man-made environment, this is another environment that is damaged by acid rain.
aquatic ecosystems
What Earth's subsystems are involved in the sulfur cycle?
lithosphere, hydrosphere, atmosphere, and biosphere
Sulfur dioxide returns to Earth from the atmosphere through these processes.
Precipitation and fallout
This is the chemical formula for the weak acid formed when sulfur dioxide dissolves in rain.
H₂SO₃
A biological process where sulfur-oxidizing bacteria create food and energy by oxidizing inorganic chemical compounds.
chemosynthesis
What is the effect of acid rain on lakes?
Lowers the pH, thus killing many of the resident plants and animals.
List down the biologically available forms of sulfur.
Sulfur dioxide (SO₂)
Sulfurous acid (H₂SO₃)
Soil sulfates (SO₄²⁻)
Hydrogen sulfide (H₂S)