College Science Notes

Front 1

cosmology

Back 1

study of the universe

Front 2

Einstein

Back 2

theory of relativity (1915)- mathematical equations to explain movement in the universe not static

Front 3

Slipher (1912) observations

Back 3

observed that all galaxies were moving away from us

Front 4

Velocity

Back 4

Freq x wavelength

Front 5

absorbed spectra

Back 5

energy is emitted in a large variety of wavelengths some can be seen as light, all elements absorb particular wavelengths of light, this leaves behind zones where no light is transmitted

Front 6

Hubble (1929)

Back 6

discovered that the furthest galaxies away are moving away the fastest

Front 7

Big Bang

Back 7

happened 13.8 bya

Front 8

after Big Bang

Back 8

universe expansion, cooling and formation of subatomic particles and atoms clouds of elements coalesced to form stars and galaxies

Front 9

George Gamow and Ralph Alder (1948)

Back 9

mathematically predicted that there should be energy left over from the big band background energy of universe should be 3 kelvin

Front 10

initial elements

Back 10

only 5 smallest now there are 92 natural ones

Front 11

solar system formation

Back 11

start with nebula, followed by proto-planetary disk, then planetesmial formation, then planet formation)

Front 12

Earth History

Back 12

begins when another protoplanet hit the Earth and the moon was formed

Front 13

Four main parts of geological time periods

Back 13

Earliest to now (Precambrian started at 4,500 ma before shells and hard parts, Paleozoic 542 ma fish plants insects reptiles, Mesozoic 251 ma dinosaurs first flowering plants, Cenozoic 65 ma current time period a lot of mammals)

Front 14

seismic energy.

Back 14

earthquake (explosion, meteor impact, etc.) occurs, mechanical energy is released some of this energy is transmitted through the earth as vibrations (vibrational energy)

Front 15

seismic velocity

Back 15

speed of seismic waves (as you go deeper in the surface they speed up)

Front 16

types of seismic waves

Back 16

p,s,l,etc.

Front 17

seismic data

Back 17

based upon "waves of motion" seismic wave radiates in all directions at a boundary, wave will reflect (bounce off) or refract (continues within Earth at an angle)