PHYS 371 Midterm: Physics 371 Midterm Study Guide

• School: University of Calgary
• Department: Physics
• Course: PHYS 371
• Professor: Jason Donev

Document Summary

Earth"s e(cid:448)olutio(cid:374) is dri(cid:448)e(cid:374) (cid:271)(cid:455) (cid:373)atter a(cid:374)d e(cid:374)erg(cid:455) (cid:894)(cid:373)akes e(cid:448)er(cid:455)thi(cid:374)g happe(cid:374)(cid:895) Universe: 4. 6 billion years ago: universe went through a big bang and nuclear reactions inside massive stars that exploded spewed contents into interstellar medium almost all elements present in cloud of gas and dust particles. Gravity attraction between = cloud shrinked causing it to rotate flattened into disk with everything accumulating at the center due to gravity causing the temperature to rise and hydrogen and protons combined to produce helium. Life interaction with natural chemical substances due to energy 4. 2 to 3. 5 billion years ago. Oldest fossil is algae 3. 5 billion years ago but less direct evidence 3. 8 billion years ago. Early organisms e(cid:454)tra(cid:272)t geother(cid:373)al e(cid:374)erg(cid:455) fro(cid:373) their surrou(cid:374)di(cid:374)gs (cid:894)(cid:272)a(cid:373)e fro(cid:373) earth"s interior heat). Organisms at o(cid:272)ea(cid:374)"s surface captured sunlight and sored energy in organic materials from. Downside to photosynthesis released new o2, a highly reactive compound destroying other chemical compounds - toxic.