Today, I went to the Museum of Natural History. The Universe was born about 15 billion years ago during the Big Bang. About 4.6 billion years ago, earth was formed. A long time ago, the continents were connected as one piece called Pangaea.There are 8 planets; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Nepture. When a planet turns on its axis, it is called a rotation, This takes one year.

A rotation is when a planet spins on its axis, this takes a different amount of time depending on each planet but we call it a day.

When a planet revolves around the sun we call it a revolution this takes one year, but one year can take longer or shorter than the earth....

Baekdu Mountain and Halla Mountain on the Han peninsula were made by volcanic eruptions. Baekdu and Halla Mountain are inactive volcanoes. Cyanobacteria are living cells that produce oxygen through photosynthesis. Herbivorous dinosaurs protected themsellves with their horns, which acted as weapons and armor. Troodons had the most advanced brains. Acrocanthosaurus were frightening and ate meat. An elephant's trunk is made up of numerous muscles. It works like a human's hand.Elephants breath through it. It helps them eat food and pull out grass.They also use it to water their bodies. In our country, the astronomical chart was already drawn during the period of Goguryeo. There is a famous astronomical chart from the Joseon Dynasty.A meteor is a chip of a comet. An opening in the earth's crust through which magma is ejected is called a volcano. Thank you for listening to my speech!!

Great work, I had to rewrite the information about rotation and revolution, I hope it helps