1. NITROGEN CYCLE

2. What do we need N2 for? ANIMALS AND PLANTS CAN’T USE ATM. N2!!
Needed for plant/animal proteins, amino acids
proteins are “building blocks” for tissue, organs, muscles

3. NITROGEN FIXING Converts N (gas) into N (solid- useful)
Atm. To soil
Bacteria remove N from air (gas) and converts it into N compounds (solid) for plants in soil
Lightning too!

4. DENITRIFICATION Converts N (solid) into N (gas)
N (solid) is in dead organisms, poop,
Carried by water
N (solid) in soil is broken down by bacteria and converted to N (gas)

5. How do humans get nitrogen? Vegetarians/Vegans- Carnivores-