Learn Class 5 Science - Earth and Universe

It is impossible to imagine just how big the Universe is in space. Human imagination cannot comprehend it. The Milky Way Galaxy is one very tiny part of the Universe. As part of The Milky Way Galaxy, the Solar System is a minor component. Now we can clearly understand how vast our universe is.

Universe

There are millions of galaxies in the Universe. Scientists say that the Big Bang theory is responsible for creating the universe.

Earth

Only the Earth is able to sustain life in the solar system. The following are some fantastic Earth facts that everyone should know:

• The Earth is the third most massive planet in the solar system and the fifth largest from the sun.
• 70% of the Earth's surface is covered by water.
• Earth rotates around an axis tilted at about 23 12 degrees. This tilt is why the Earth hardly ever touches the ground.
• We have four seasons that are 23 1/2 degrees.
• Earth is estimated to be 4.5 to 4.6 billion years old, and the oldest known living organism is estimated to be 3.9 billion years old.
• Plate tectonics exist only on Earth. Plate tectonics refers to areas of floating magma on top of the surface of a planet. The plates can move against one another.
• There are small flattened areas at the north and south poles of the Earth, which isn't a perfect sphere.
• In actuality, it is an oblate spheroid whose central portion bulges out due to the rotation of Earth.
• Earth's interior is about 6000 degrees Celsius.