Exploring Biogeochemical Cycles

The video tutorial covers biogeochemical cycles, focusing on the carbon, nitrogen, and phosphorus cycles. It explains key vocabulary such as abiotic and biotic, and details how matter cycles through the environment. The carbon cycle section discusses the role of fossil fuels and climate change. The nitrogen cycle section explains nitrogen fixation and its environmental effects, including eutrophication. The phosphorus cycle section highlights how phosphorus is released from rocks and its impact on water systems. Human impacts on these cycles are also discussed.

What does the term 'abiotic' refer to?

• Nonliving elements

• Living organisms

• Biological processes

• Chemical reactions

Which of the following is an example of a biotic factor?

• Rocks

• Air

• Water

• Plants

What is the largest reservoir of carbon?

• Sedimentary rock

• Forests

• Oceans

• Atmosphere

Tags

NGSS.HS-ESS2-6

How is carbon released back into the atmosphere from sedimentary rocks?

• Photosynthesis

• Combustion

• Erosion and volcanic eruptions

• Cellular respiration

What is a major human impact on the carbon cycle?

• Burning of fossil fuels

• Decreased cellular respiration

• Increased nitrogen fixation

• Increased photosynthesis

Tags

NGSS.HS-ESS2-6

NGSS.HS-LS2-5

What process converts nitrogen gas into a usable form for plants?

• Combustion

• Cellular respiration

• Photosynthesis

• Nitrogen fixation

Which type of bacteria is involved in nitrogen fixation?

• Nitrogen-fixing bacteria

• Respiratory bacteria

• Decomposers

• Photosynthetic bacteria

What is a consequence of excessive nitrogen in water systems?

• Increased oxygen levels

• Decreased plant growth

• Algal blooms

• Increased fish population

Tags

NGSS.HS-LS2-2

How is phosphorus primarily released into the environment?

• Combustion

• Photosynthesis

• Erosion of rocks

• Nitrogen fixation

What is a major human impact on the phosphorus cycle?

• Use of fertilizers and detergents

• Increased photosynthesis

• Decreased erosion

• Increased nitrogen fixation

Tags

NGSS.HS-LS2-7