Earth origin of the earth

THE ORIGIN OF THE EARTH (including the moon and our water) assembled by R. Perry using online sources including the University of West Virginia, Dept of Geology and Geography and the National Geographic Society

page 1

1

Origin of Earth’s Matter • The earth is made of recycled elements formed in stars that existed prior to our Sun. • Supernova explosions produced nebular dust clouds of various elements.

• Our solar system formed from a nebular dust cloud. page 1

2

Supernova explosions produce nebular dust clouds that form solar systems and planets

page 1

3

page 1

4

protosun Inner planets

outer planets

page 1

5

Formation of Earth • Our planet formed along with all the other planets when our solar system formed 4.6 BY ago.

•Planetesimal accretion: the planets formed by attracting and adding material • Gravity slowly brought solids page 1 6 and gases together

The proto-sun and rings of matter formed the planets. page 1

7

page 1

8

The Early Molten Earth Heat Sources: 1. Gravitational compaction 2. Impact energy converted to heat 3. Heat from radioactive decay page 1

9

Slowly the young Earth cooled and the surface solidified.

Volcanic activity continued

page 1

10

Play video animation click on this link http://www.natgeoeducationvideo.com/film/1170/the-origin-of-earth

page 1

11

WHERE DID OUR M N COME FROM? page 1

12

A PLANETESIMAL ABOUT THE SIZE OF MARS COLLOIDES WITH page 1 EARTH 13 THE

THE IMPACT SENDS A HUGE AMOUNT OF ROCK AND DUST 1 14 DEBRISpage INTO EARTH ORBIT

ORBITING DEBRIS EVENTUALLY COALESCES INTO ONE OBJECT: page 1 MOON. 15 THE

page 1

16

page 1

17

WHERE DID OUR H2O COME FROM? page 1

18

One possible source: ice in meteorites.

page 1

19

H 2O

page 1

20

Another possible source: volcanic outgassing.

http://scienceatcal.berkeley.edu/f/ASHY_PATA_120105_13090.jpg

page 1

21

COMPOSITION OF VOLCANIC GASES

page 1

22

The ocean covers 71 percent of the Earth's surface and contains 97 percent of the planet's water

page 1

23

The primitive atmosphere and Earth conditions set the stage for the origin of life. List the 5 chemicals in page 1 atmosphere.

24 the early

The End or, should we say The Beginning ! page 1

25