Biogeochemical cycles Key Point #1: Elements and compounds move through the ecosystem Remember: matter is neither created nor destroyed!!! Let’s talk about 3 things cycling through ecosystems Water Carbon Nitrogen

WATER CYCLE

Water Cycle Transpiration - Evaporation of water from plants Condensation - changing of water vapor (water in the air) into a liquid Precipitation - falling of water back to the earth as snow, sleet, hail, or rain Evaporation - process of water becoming gas

Water Cycle Transpiration - Evaporation of water from plants Condensation - changing of water vapor (water in the air) into a liquid Precipitation - falling of water back to the earth as snow, sleet, hail, or rain Evaporation - process of water becoming gas

Transpiration Evaporation

There is water present in both plants and bodies of water (rivers, lakes, oceans). a. Water leaves a plant and enters the atmosphere through the process of TRANSPIRATION. b. Water leaves a body of water and enters the atmosphere through the process of EVAPORATION.

Water Cycle Transpiration - Evaporation of water from plants Condensation - changing of water vapor (water in the air) into a liquid Precipitation - falling of water back to the earth as snow, sleet, hail, or rain Evaporation - process of water becoming gas

When it is in the atmosphere, it is called water vapor When it is in the atmosphere, it is called water vapor. It will eventually become a cloud through the process of condensation.

Water Cycle Transpiration - Evaporation of water from plants Condensation - changing of water vapor (water in the air) into a liquid Precipitation - falling of water back to the earth as snow, sleet, hail, or rain Evaporation - process of water becoming gas

The water falls from the cloud as some form of :’( weather through a process of precipitation.

CARBON CYCLE

Carbon Cycle 1. There is a lot of carbon dioxide (CO2) in the air. 2. CO2 is taken out of the air by plants through photosynthesis.

Carbon Cycle 3. BOTH plants and animals release CO2 into the air through respiration.

Carbon Cycle 4. Decaying plants, animals, and waste (decomposition) after millions of years will be changed into fossil fuels.

Carbon Cycle 5. Fossil fuels can be burned by automobiles, releasing carbon dioxide back into the atmosphere. This is called combustion.

NITROGEN CYCLE

Nitrogen Cycle There is A LOT of nitrogen in the air but plants and animals CAN’T use it! 80% of the Earth’s atmosphere is nitrogen

Nitrogen Cycle To use the nitrogen, bacteria “fix” nitrogen from the air for the plants = called nitrogen Fixation Bacteria, that live on the roots of some plants, change nitrogen into ammonia, a form of nitrogen plants can use.

Animals get nitrogen from the plants by eating them Animals get nitrogen from the plants by eating them. When plants and animals die, their decaying bodies release nitrogen back through the process decomposition.

Phosphorous Cycle

Phosphorous Cycle Phosphorous is a key component of genetic material (DNA and RNA) Phosphorus comes from erosion of rocks and decomposition It is absorbed by plant roots, we get it by eating them

What cycles?

Combustion

Hold up 2 cards! Decomposition

TWO CARDS

Transpiration

OKAY, now cut the backs of cards

This is the process where water is taken from the ground by a plant and returned to the environment.

Kobe uses sugar to keep going during a big game. He breathes out CO2.

This is the process where water turns from a liquid into a gas.

N2 is changed to a usable form of nitrogen in NO3 during

Snow, sleet, hail and rain are examples of this process.

FOLDER! Worksheet Daily quiz Grade sheet