ENVS 1000 Lecture Notes - Lecture 2: Snowball Earth, Fomalhaut, Trilobite

• School: York University
• Department: Environmental Studies
• Course: ENVS 1000
• Professor: Peter Timmerman

Document Summary

Lecture 02 earth in our hands (in a world of trouble) (cid:862)the goal of life is li(cid:448)i(cid:374)g i(cid:374) a agree(cid:373)e(cid:374)t (cid:449)ith (cid:374)ature. (cid:863) 530: eukaryotes prokaryotic vs eukaryotic cells (cid:862)eu(cid:863)= (cid:862)good(cid:863) + (cid:862)karyos(cid:863) = (cid:862)ker(cid:374)el(cid:863) early cambrian trilobite: 350 million ago. ~pro(cid:271)a(cid:271)ly depe(cid:374)ds o(cid:374) a (cid:862)frie(cid:374)dly(cid:863) (cid:272)he(cid:373)i(cid:272)al ele(cid:373)e(cid:374)t as its stru(cid:272)tural (cid:271)asis ((cid:272)ar(cid:271)o(cid:374), sili(cid:272)o(cid:374), etc. ) 8 major milestones in the history of life on earth light seed, captain. 25 lights years way sizes of kepler plant of kepoter currect nestimates suggest that here are up to 400 million stars in the 50 billion planters. If even 1% of those are in their systems gol. Circles around a gas giant (polyphemus)-shuld be tidally locked, or subject to huge gravitational waves. Earth"s (cid:271)iosphere is (cid:373)a(cid:374)ipulated (cid:271)y life to sustai(cid:374) life itself. Case study: mount st. helens explosion may 18, 1980. A(cid:272)ti(cid:448)e (cid:448)ol(cid:272)a(cid:374)oes, plate te(cid:272)to(cid:374)i(cid:272)s, a(cid:374)d the (cid:862)ri(cid:374)g of fire(cid:863)