https://padlet.com/annamccart/9cg8xun6eeon Everything found at: https://www.learner.org/wp-content/interactive/dynamicearth/structure/index.html en-us 2020-03-30 13:46:00 UTC 2024-04-28 08:47:39 UTC hello@padlet.com annamccart https://padlet.com/annamccart/9cg8xun6eeon/wish/482187361 Geologist discovered that the Earth is made up of different layers by studying seismic waves. They concluded that the Earth is made up of three distinct layers, which are the crust, mantle, and core]]> 2020-03-30 13:49:48 UTC https://padlet.com/annamccart/9cg8xun6eeon/wish/482187361 annamccart https://padlet.com/annamccart/9cg8xun6eeon/wish/482209701 2020-03-30 13:57:38 UTC https://padlet.com/annamccart/9cg8xun6eeon/wish/482209701 annamccart https://padlet.com/annamccart/9cg8xun6eeon/wish/482215083  The first layer is the crust. This is where we live. It is the thinnest layer, only about 5 kilometers under the oceans, and about 30 kilometers. 
Between the crust and the mantle, there is a cross section, which is called the lithosphere and athenosphere. The lithosphere is made up of the very slowly moving tectonic plates. The asthenosphere is where the plates move. This layer is somewhat liquid.]]> 2020-03-30 13:59:29 UTC https://padlet.com/annamccart/9cg8xun6eeon/wish/482215083 annamccart https://padlet.com/annamccart/9cg8xun6eeon/wish/482247281 The next layer is the mantle. It is about 2,900 kilometers thick. The mantle can also be split into two sections, called the upper and lower mantle.]]> 2020-03-30 14:10:30 UTC https://padlet.com/annamccart/9cg8xun6eeon/wish/482247281 annamccart https://padlet.com/annamccart/9cg8xun6eeon/wish/484415607 Made up of mostly iron and nickel, the outer core is the only liquid layer of the Earth. It is about 2,300 kilometers thick.]]> 2020-03-31 13:37:36 UTC https://padlet.com/annamccart/9cg8xun6eeon/wish/484415607 annamccart https://padlet.com/annamccart/9cg8xun6eeon/wish/484425355 The inner core is also made up of iron and nickel, but in solid form instead of liquid form. It is the very center of the Earth and about 1,200 kilometers in diameter. ]]> 2020-03-31 13:41:08 UTC https://padlet.com/annamccart/9cg8xun6eeon/wish/484425355 annamccart https://padlet.com/annamccart/9cg8xun6eeon/wish/484441489 2020-03-31 13:47:17 UTC https://padlet.com/annamccart/9cg8xun6eeon/wish/484441489