Remake of History of Earth Science by Bonnie Triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc en-us 2016-09-09 14:01:02 UTC 2025-11-02 16:51:15 UTC hello@padlet.com Photovoltaic Energy bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740881 In 1876, Photovoltaic Energy (solar cells) was discovered. William Grylls and Richard Day discovered that when selenium was exposed to light, it could create energy. ]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740881 Earth Doesn’t Take 24 Hours to Rotate on its Axis bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740882 It actually takes 23 hours, 56 minutes and 4 seconds]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740882 Earth is the densest planet in the Solar System bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740883 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740883 Earth has a powerful magnetic field bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740885 This is caused by the nickel-iron core of the planet, combined with its rapid rotation. This field protects the Earth from the effects of solar wind.

]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740885 Gold Rush! bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740886 The discovery of gold in MN led to the 1865-1866 Vermillion Gold Rush. Miners of history have moved all over the U.S. to try and "make it big"!]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740886 Theory of Plate Tectonics bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740887 In the 1960's, the Theory of Plate Tectonics was developed. This theory explains the movement of the earth and explains earthquakes, volcanoes, and other geologic phenomenon ]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740887 Google Earth was invented in 2005. bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740888 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740888 Water bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740890 Seventy-five percent of Earth's surface is covered by oceans]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740890 Weather Radar  bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740892 First recorded weather radar observation- 1953
WWII military radar operations noticed weather effecting the noise]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740892 In 1915, Continental Drift was first proposed  bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740893 Alfred Wegener stated that the Earth's crust slowly drifts atop the Earth's liquid core. At this point, people did not know there was a liquid core. ]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740893 Pangaea Breaks Apart! bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740894 This video shows our Earth 180 million years ago to present day!]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740894 Dinosaur fossils were found 1676 by Reverand Plot bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740896

]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740896 Earth's Atmosphere  bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740897 When Earth was first formed it was a solid ball of molten rock with no atmosphere. The atmosphere or air we now breathe was formed after the development of the first living things, blue-green algae, that appeared about two billion years ago. ]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740897 "Snowball Earth" Hypothesis bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740898 Sometime earlier than 650 Mya, it is thought that the Earth was nearly entirely frozen!]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740898 In 1936, the Earth's core was discovered after years of debate and research. bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740899 The idea of the Earth's core had been proposed 20+ years earlier.]]> 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740899 Oxygen enters the atmosphere - 2400 Ma bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740900 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740900 The Earth formed in 4600 MA from a cloud of gas & dust. bonnie_triplet https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740901 2016-09-09 14:01:02 UTC https://padlet.com/bonnie_triplet/edm3wtm0e2xc/wish/122740901