CYCLES

Nitrogen Cycle, Water Cycle, Carbon Cycle

Nitrogen Cycle:

Step 1 Nitrogen Fixation: Special bacteria convert the nitrogen gas to ammonia which the plants can use.

Step 2 Nitrification: Nitrification is the proccess which converts the ammonia into nitrite ions which the plants can take in as nutrients.

Step 3 Ammonification: After all the living organisms have used the nitrogen, decomposer bacteria convert the nitrogen-rich waste coumponds into simpler ones.

Step 4 Denitrification: Denitrification is the final step in which one bacteria convert the simple nitrogen coumponds back into nitrogen gas which is then released back into the atmosphere to begin the cycle again.

Water Cycle:

Step 1 Evaporation: This is when the warmth from the sun causes water from oceans, lakes, streams, ice and soil to rise into the air and turn into water vapour (gas). Water droplets join together to make clouds.

Step 2 Condensation: This is when water vapour in the air cools down and turn back into liquid water.

Step 3 Precipitation: When the water falls from the clouds int he sky.

Step 4 Collection: This is when water falls from the cloud as rain, snow, hail, or sleet, collects in the ocean, rivers, lakes, and streams. Most will infiltrate the ground and will be collected as underground water

Carbon Cycle

Step 1 Carbon enters the atmosphere as carbon dioxide from respiration and combustion.

Step 2 Carbon dioxide is absorbed by producers to make carbohydrates in photosynthesis.

Step 3 Animals feed on the plant passing the carbon compounds along the food chain.