Dear Hyeon-Jin,

Hi!!! How are you doing? I have missed you since vacation started. Today, I went to the Museum of Natural History with Jae-Yun. It was amazing! I wish Ye-Eun, Seo-Yun, and you were with us.

First, we learned about dinosaurs. First, we saw a Triceratop, and the name means 'three horn faced dinosaur.' It is an herbivore. Herbivores have small and flat teeth, and their eyes are on the side. However, carnivores have big and sharp teeth, and their eyes are in the front. They also have sharp claws, and their front paws are smaller than their back paws. We can't be completely sure that a Triceratop was an herbivore, and a Tyrannosauros Rex was a carnivore. We can just guess by comparing them with animals nowadays, like lions or zebras, which are carnivores and herbivores, respectively. The biggest dinosaur in Korea was the Ultrasaurus. The biggest dinosaur in the whole world was the Seismosaurus. The name of a Seismosaurus means 'Earthquake lizard'. They named it that because people think that when the Seismosourus walked, the land would shake because it was so big and heavy. I was also impressed about the Troodon. It weighed about 22.7kg, and its brain weighed between 37~ 45g. This dinosaur had the most advanced brain.

Second, we learned about the solar system. There are 8 planets, starting with the planet closest to the Sun, Mercury. The other planets are Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Pluto was in our solar system, too, but because it is too small and far, scientists banned it. Mercury comes from the name of one of the Roman gods, Hermes. He was the messenger of the gods, and he also symbolized the lying god. The name of the planet Venus is Roman, but it also refers to the Greek goddess of beauty and love, Aphrodite.  Venus is bright and shines beautifully, so I think that is why they named it Venus. Mars is related to Ares. In Greece, they say Ares, but in Rome, they say Mars. Ares was the God of war, and the color red was his symbol. So, because Mars and Ares are similar, they named the planet Mars 'Mars.' The biggest planet, Jupiter, has the same name as the king of the gods, Zeus. Because Jupiter is the biggest planet, people use the name Jupiter. Saturn is related with Zeus or Jupiter's father, Cronus. He was the god of farming, so they named the planet Saturn 'Saturn, which symbolizes soil. Uranus is related to Gaea, who symbolized the Earth. Finally, Neptune is related to Poseidon, who symbolized the sea.  When a planet turns on its axis, it is called rotation, which takes one day. When the earth revolves around the sun, this is called revolution, which takes one year.

I'll see you at 27th. Good bye~

-You're dearest friend, Minjin-

* Hi,

Great job! Your English is impressive.