Exploring Biogeochemical Cycles

How many species are estimated to exist on Earth?

• 5.5 million

• 10.2 million

• 12.3 million

• 8.7 million

Which elements are critical to the survival of living organisms?

• Hydrogen, Carbon, Nitrogen, Oxygen, Phosphorus, Potassium

• Hydrogen, Carbon, Nitrogen, Oxygen, Phosphorus, Chlorine

• Hydrogen, Helium, Nitrogen, Oxygen, Phosphorus, Sulfur

• Hydrogen, Carbon, Nitrogen, Oxygen, Phosphorus, Sulfur

What are the two main types of biogeochemical cycles?

• Gaseous and Sedimentary Cycles

• Gaseous and Liquid Cycles

• Sedimentary and Liquid Cycles

• Gaseous and Organic Cycles

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

Which cycle involves the atmosphere as its major pool?

• Sulfur Cycle

• Nitrogen Cycle

• Carbon Cycle

• Phosphorus Cycle

What is the primary source of carbon in the carbon cycle?

• Organic Matter

• Carbon Dioxide

• Carbon Monoxide

• Methane

Tags

NGSS.MS-LS2-3

In which ecosystems do carbon cycle processes occur faster?

• Warm, wet ecosystems

• Warm, dry ecosystems

• Cold, wet ecosystems

• Cold, dry ecosystems

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

How does nitrogen enter ecosystems?

• Through photosynthesis

• Through atmospheric deposition and nitrogen fixation

• Through respiration

• Through decomposition

What is the main reservoir of phosphorus?

• Soil

• Rocks and natural phosphate deposits

• Oceans

• Atmosphere

What are the two phases of the sulfur cycle?

• Gaseous and Liquid

• Sedimentary and Gaseous

• Solid and Liquid

• Organic and Inorganic

What is the role of ozone in the atmosphere?

• It acts as a greenhouse gas

• It shields the planet from ultraviolet radiation

• It contributes to acid rain

• It is a major component of smog