Today, I went to the Museum of Natural History.

 First, I learned about the history and structure of the Earth. Earth was formed by the Big Bang which was held 15 billion years ago just like the other 7 planets; Mercury, Venus, Mars, Jupiter, Satrun, Uranus, and Neptune. Long time ago, the land was covered with magma and there was no atmonsphere which caused no organisms to live but today, thanks to Cyanobacteria which made the atmonsphere, we are able to live our wonderful life. Earth has 4 layers which is Inner core, Outer core, Mantle, and crust. The Mantle is liquid form which makes the crust move. This made the Pangae become many different continents. There is a theory about the continental movement which is plate tectonic.

 Second, there was many kinds of earthquakes, caves and volcanoes which was formed by continental movements. There was shield volcanoe, and strato volcanoe for volcanoes, and limestone cave for caves.

 Last, we learned about the Mesozoic era which is also called the era of dinosaurs. There was many kinds of dinosaurs such as Tyrannosaurus, Troodon, and Acrocanthosaurus. Tyrannosaurus was the biggest carnivore, and Troodon was a very smart dinosaur which could eat their prey with front legs.

 I learned the long history of Earth and thought we should try harder to carry on the history of nature.