Evolution of Earth's Atmosphere and Hydrosphere 6-10 Questions by https://padlet.com/nickcampbell449/w1256vuqhyjk Nick Campbell en-us 2018-10-01 19:02:04 UTC 2018-10-02 18:59:31 UTC hello@padlet.com #6. Why was Earth unable to hold its first atmosphere? nickcampbell449 https://padlet.com/nickcampbell449/w1256vuqhyjk/wish/287824048 Earth's first atmosphere mainly contained H2 and He, and were most likely lost to space due to the fact that Earth's gravity couldn't hold  onto lighter gases. ]]> 2018-10-01 19:03:46 UTC https://padlet.com/nickcampbell449/w1256vuqhyjk/wish/287824048 #7. What was Earth's second atmosphere probably like, and what was its origin? nickcampbell449 https://padlet.com/nickcampbell449/w1256vuqhyjk/wish/287829804 Earth's second atmosphere contained H2O, CO2, SO2, S2, Cl2, N2, H2, NH3, and CH4. The origin of Earth's second atmosphere is that it was produced by outgassing from volcanoes.]]> 2018-10-01 19:14:30 UTC https://padlet.com/nickcampbell449/w1256vuqhyjk/wish/287829804 #8. What is 1 scientific explanation for the origins of our oceans, and what is the evidence? nickcampbell449 https://padlet.com/nickcampbell449/w1256vuqhyjk/wish/288313673 As earth cooled, H2O produced from outgassing could exist as liquid during the early Archean period, which could've allowed oceans to form.]]> 2018-10-02 18:25:09 UTC https://padlet.com/nickcampbell449/w1256vuqhyjk/wish/288313673 #9. Why couldn't there have been oceans during Earth's earliest years? nickcampbell449 https://padlet.com/nickcampbell449/w1256vuqhyjk/wish/288318559 Heat released from asteroids and comets hitting Earth restricted the formation of oceans.]]> 2018-10-02 18:32:33 UTC https://padlet.com/nickcampbell449/w1256vuqhyjk/wish/288318559 #10. What evidence is there that comets were not big contributors to Earth's oceans nickcampbell449 https://padlet.com/nickcampbell449/w1256vuqhyjk/wish/288323192 Heavy water carrying comets are rich in deuterium, and if a comet's collision(s) were a source of our oceans, the water would be rich in deuterium, which they are not.]]> 2018-10-02 18:39:51 UTC https://padlet.com/nickcampbell449/w1256vuqhyjk/wish/288323192