Today I went to the Museum of Natural History.

The Universe was formed about 15 billion years ago.

The earth was formed about 4.6 billion years ago during the Big Bang.

A long ago, there was only one continent called Pangaea.

As time goes by, it has been divided into 6 continents.

There are 8 planets in the solar system.

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

Pluto is not included in the solar system because it is too small. revolving pattern is diffrent from other planets.

When the planet turns on its axis, it is called a rotation.

This takes 24 hours. It is connected to day and night.

When the Earth revolves around the Sun, it is called a revolution.

This takes one year.  It is connected  to the winter solstice and the summer solstice.

Horoscope is a place where stars are. A horoscope is something that uses the solar system (sun, moon, planets etc) and shows what will happen in the future or about our past.

A volcano is an opening in the earth's crust where magma is ejected.

Baekdu mountain and Halla mountain were made by volcanoes.

They are inactive volcanoes.

Cyanobacteria are living cells that produce oxygen through photosynthesis.

Carnivorous dinosaurs ate meat. Herbivorous dinosaurs ate plants.

I saw lots of dinosaur bones. 

I couldn't believe that they had existed on the earth.

Good work, the only thing you need to be careful of is that pluto is no longer a planet because of its size, it still revolves around the sun like the other planets-slowly, but it is because it is far tinier than first predicted.