GLY 1103- Midterm Exam Guide - Comprehensive Notes for the exam ( 13 pages long!)
Document Summary
Universe age is estimated at 13. 7 billion years, but earth is 4. 6 billion years. The universe is expanding which we know from the doppler effect, when things move, sound waves are compressed in direction of movement a(cid:374)d e(cid:454)pa(cid:374)di(cid:374)g i(cid:374) the directio(cid:374) it"s co(cid:373)i(cid:374)g fro(cid:373) Solar system began as a nebula- a cloud of gas and particles. Dust grains clump into plantisimals which collide and form planets. Stellar fusion creates elements up to #26 (iron) Through heati(cid:374)g a(cid:374)d differe(cid:374)tiatio(cid:374) (cid:449)e ha(cid:448)e earth"s la(cid:455)ers. 4. 4 billion years ago a collision caused bits of earth to break off and form the moon. The atmosphere is made of nitrogen, oxygen, and carbon dioxide which we share with titan, where there are methane layers. Our early atmosphere was ammonia, hydrogen sulfide and methane. Dynamic equilibrium- they are all connected and effect each other. Inner core- solid, nickel and iron, 760 mi radius, not rigidly connected to mantle, so many rotate at different speeds.
