It seems that there is only one big ocean in the world, because all oceans flow into each other. But there are five main oceans: Atlantic Ocean, Pacific Ocean, Indian Ocean, Arctic Ocean, and Antarctic Ocean. Pacific Ocean is the largest and deepest ocean, covering about one-third of the Earth's surface. Atlantic Ocean is the … Continue reading How Many Oceans?
A volcano is a mountain that sometimes shoots hot, liquid rock out of its top. Deep inside a volcano is an area filled with liquid rock. If pressure builds up in the chamber, the volcano may explode, and liquid rock will shoot out of the top. When the liquid rock is within earth, it is … Continue reading Magma Versus Lava
Earth formed about 4.54 billion years ago from a cloud of rock, dust, and gas surrounding the newly formed sun. Gravity pulled this space debris together to form a sphere, which eventually melted and developed a layered structure of metal and rock. This structure then cooled down, finally becoming cool enough to support liquid oceans … Continue reading From “Dead As a Rock” to “Brimming with Life”