- Please get your parent to sign the Learning Sheets for Unit 5. Revise the LS for the upcoming English Test 5. It will most probably b on Thursday.
Science:
- PSB: Cycles, WS 11, 12 and 13. Try to remember the concepts that we have gone though today before answering the questions.
where does gas come from
ReplyDeleteThank stars that died, and exploded a long, long time ago. When the Universe was born, there was little more than elementary particles formed from cooled energy. From these particles, the element Hydrogen arose. I took massive clouds of this Hydrogen to form the first massive, and super massive stars. These stars fused their Hydrogen into heavier elements. ALL elements, heavier than Hydrogen, were created in the first primordial stars, including the oxygen we breathe.
DeleteThere is a reciprocation on Earth where plants breathe CO2 and exhale O2, and animals breathe O2 and exhale CO2, but CO2 or O2, the oxygen was made in early stars that exploded long ago.
Earth has had an atmosphere since its formation. Gasses got pulled to the surface of the earth by gravity when there was plenty of material spinning around the sun in a disk when the planets were first forming. Then once things began to cool down volcanoes began pumping gasses like carbon dioxide and methane into the air. Once life began it started to convert all that carbon dioxide into oxygen. From there the atmosphere has fluctuated in its proportion of gasses until it reached present day levels. The magnetic field caused by Earth's dynamo like core keeps solar radiation from blowing the upper portions of the atmosphere away.
ReplyDeletethanks fred and kaifeng
ReplyDeleteno prob
ReplyDelete