Human Impacts on Biogeochemical cycles

Human Impacts on Biogeochemical cycles

Multiple Select

Which cycle did you do your research on?

• Water Cycle

• Carbon Cycle

• Nitrogen Cycle

• Phosphorus Cycle

​Water Cycle

• ​Importance: regulates body temperature, protects organs and tissues, helps dissolve nutrients in body. Approx. 60% of human body is water

• ​Water Pollution through plastics, toxic waste

• Impacts:

  • ​how we get water (drinking)

  • ​how our environment gets water (acid rain)

Multiple Choice

The water on earth covers approximately 

• 25%

• 55%

• 70%

• 90%

Multiple Choice

When water is heated in the ocean by the sun and turns into water vapor

• Evaporation

• Transpiration

• Condensation

• Runoff

Multiple Choice

Water Vapor leaving the leaves and returning to the atmosphere is called...

• Evaporation

• Transpiration

• Condensation

• Vascular Tissue

Multiple Choice

Precipitation occurs because 

• the droplets evaporate in the air

• the droplets are too light for the air to hold

• the droplets are too heavy for the air to hold

• It is time for the water to fall

​Carbon Cycle

• ​Importance: essential element of all organic molecules and to carry out the characteristics of life (growth/replication/energy)

• ​Climate change

• ​Impacts:

  • ​the earth's climate patterns

  • ​seasonal activities/way of life

  • ​ecosystems/behavior

Multiple Choice

What does NOT produce carbon dioxide?

• Photosynthesis

• Cell respiration

• Burning Fossil Fuels

• Plants decaying

Multiple Choice

Organisms that do not decompose can be buried and become what?

• Water

• part of the atmosphere

• Nutrients

• Fossil Fuels

Multiple Choice

The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?

• lower levels of ozone in the atmosphere

• higher levels of carbon dioxide and other greenhouse gases in the atmosphere

• higher levels of oxygen in the atmosphere

• lower levels of nitrogen in the atmosphere

​Nitrogen Cycle

• ​Importance: essential for plant life, key building block of DNA

• ​Soil Nutrient Depletion no more nitrogen in the soil (farming practices

• ​Impacts:

  • ​the food we eat

  • ​the plants we see

Multiple Choice

The organisms that need nitrogen to survive are...

• only plants

• only animals

• only bacteria

• all living organisms

Multiple Choice

How much of the atmosphere is composed of nitrogen gas?

• 87%

• 78%

• 38%

• 21%

Multiple Choice

What allows Nitrogen to keep getting recycled through the system?

(ex. After plants and animals contain nitrogen, what puts it back into atmosphere and soil?)

• Decomposition

• Nitrogen fixing bacteria

• Precipitation

• Condensation

​Phosphorous Cycle

• ​Doesn't enter atmosphere

• ​Importance: needed to build healthy bones, tissues, and body

• ​Eutrophication: excessive nutrients such as nitrogen or phosphorous in the water/soil (fertilizers)

• ​Impacts: overgrowth of algae, covers lakes - low oxygen, no life under algae

Multiple Choice

In general, algal blooms/eutrophication occur when

• toxins accumulate in the water.

• nutrients (phosphorus/nitrogen) increase in the water.

• nutrients decrease in the water.

Multiple Choice

Which of the following statements is true of the phosphorus cycle?

• Phosphorus enters the atmosphere as phosphates.

• The phosphorus cycle utilizes the processes of erosion, and weathering.

• The phosphorus cycle utilizes bacteria to breakdown phosphates and make them available for plants.

• The phosphorus cycle utilizes the processes of erosion, and weathering.

​1. Stack Notebooks (open to table of contents- unit 2/3)

2. Go to Schoology to complete the short quiz