GEO 110 Lecture 5: Geo 110-1

• School: Ryerson University
• Department: Geography
• Course: GEO 110
• Professor: Doug Banting

Document Summary

Sun accounts for 99. 9% of material in the universe. 107,280 km/h sun movement around the earth: revolution of earth. (cid:1007)(cid:1010)(cid:1009). (cid:1006)(cid:1008) da(cid:455)s for the earth e(cid:448)ol(cid:448)e i(cid:374) it"s or(cid:271)it arou(cid:374)d the su(cid:374)/ (cid:1007)(cid:1010)(cid:1010) da(cid:455)s for leap (cid:455)ear. Re(cid:448)olutio(cid:374) of earth is (cid:449)hat gi(cid:448)es the seaso(cid:374)s, earth"s rotatio(cid:374) o(cid:374) it"s a(cid:454)is gi(cid:448)es da(cid:455) & light; a(cid:454)is is tilted at 23. 5 degrees; 24 h to make full rotation. Earth"s major components: atmosphere layer of gases, nitrogen oxide is largest 78%, oxygen 21%, helium. Nitrogen fixation; bacteria in roots of plants that absorb nitrogen oxide and convert into ammonium (atmosphere loses nitrogen due to bacteria activity and converted to ammonia) Denitrification/ nitrogen on fixation; reverse process where atmosphere gains nitrogen, plants decompose & bacteria enhances nitrogen. Primary way atmosphere co2 is by photosynthesis- plants absorb carbon; offset the episodic climate oscillation (prevent earth from over heating) Ice gaps - artic, antarctic & greenland :1. 8% fresh water sources.