Biogeochemical Cycles Review

Standards for Today's Lesson

HS-LS2-5 Develop a model to illustrate the role of photosynthesis and cellular respiration in the cycling of carbon among the biosphere, atmosphere, hydrosphere, and geosphere.

HS-LS2-4 Use mathematical representations to support claims for the cycling of matter and energy flow among organisms in an ecosystem.

Word Cloud

What do you think of when you hear the term biogeochemical cycles? (Remember these are the water, carbon, nitrigen, and phosphorous cycles.

Match

Match the following water cycle terms

Standard (HS-LS2-5)

• when the water droplets that form clouds become large enough, the water droplets fall to the earth (rain, sleet, snow)

• liquid water returns to the atmosphere (vaporizes)

• evaporation of water from plants

• water vapor in the air condenses to form clouds, in a process called

• surface water found on land that is eventually carried back to an ocean or lake. 

Precipitation

Evaporation

Transpiration

Condensation

Runoff

• Precipitation

• Evaporation

• Transpiration

• Condensation

• Runoff

Open Ended

How is water returned to the earth?

Standard (HS-LS2-5)

Open Ended

How is water returned to the atmosphere?

Standard (HS-LS2-5)

Poll

How are you feeling about the concept review so far?

• Awesome I got this!!

• Pretty Confident

• I am okay.

• I could use some help.

Drag and Drop

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- all living organisms undergo cellular respiration. They use oxygen to break down food; CO2 is a byproduct of the reaction (exhaled).

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- Marine organisms use carbon to make shells (calcium carbonate); when they die, the calcium carbonate is broken down, CO2 forms, and is returned to the atmosphere.

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when carbon returns to the atmosphere through combustion or burning of fossil fuels. (Carbon is locked beneath the earth; dead organisms in sediment may gradually transform by heat and pressure into fossil fuels).

Standard (HS-LS2-4)

Drag these tiles and drop them in the correct blank above

Respiration

Erosion

Combustion-

Reorder

Reorder the following phases of the nitrogen cycle.

Standard (HS-LS2-4)

• Nitrogen fixation- bacteria combine nitrogen from the atmosphere with hydrogen to make ammonia (NH3) in the soil. 

• Ammonification- production of ammonia by bacteria during the decay of organic matter.

• Nitrification- production of nitrates and nitrites from ammonia (NO3). Bacteria are responsible for nitrification. Plants can use nitrates and nitrites to make proteins. 

• Assimilation- absorption of nitrogen into organic compounds by plants (absorbed through roots). 

• Denitrification- conversion of nitrate to nitrogen gas, which is released back into the atmosphere. 

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Open Ended

What is a main difference between the phosphorous cycle and the other 3 cycles (water, carbon, and nitrogen)?

Find an example of one of the cycles in nature.

Take 4 minutes to research an example of nature's carbon, water, nitrogen, or phosphorous cycles. Be prepared to share with the class.

Open Ended

What was your finding of an example from the last slide.

Multiple Choice

1. Carbon dioxide is taken from the atmosphere by _____.  

• 1. plants for photosynthesis 

• 1. plants for cellular respiration

• 1. humans when burning fossil fuels 

• 1. decomposition of organic plants and animals

Multiple Choice

1. How do animals get the nitrogen that they need to create proteins and nucleic acids? 

• They create it

• They absorb it from the atmosphere

• they consume it from other living things

• they get it from the soil

Multiple Choice

1. The phosphorous cycle does not travel into ______________.

• The atmosphere

• plants

• animals

• water

Multiple Choice

The process, represented by A, takes place when liquid water is heated by the sun and transforms into the gaseous form of water. What process in the water cycle is this called?

• Condensation

• Evaporation

• Transpiration

• Precipitation