SOLAR SYSTEM

Detailed explanation-1: -At its beginning, Earth was unrecognizable from its modern form. At first, it was extremely hot, to the point that the planet likely consisted almost entirely of molten magma. Over the course of a few hundred million years, the planet began to cool and oceans of liquid water formed.

Detailed explanation-2: -When you look up at the moon’s pockmarked face, you’re actually staring at Earth’s early history.

Detailed explanation-3: -Earth was molten for a period around 4.5 billion years ago due to constant bombardment from asteroids and other objects, and then melted again when the iron in the Earth sank down to form the planet’s core.

Detailed explanation-4: -After the moon-forming impact, Earth was a very different planet from the world we see today! Where the present-day Earth has oceans covering much of its surface, the early Earth was covered in a magma ocean-a layer of molten rock hundreds of miles deep melted by the energy released during the collision.

Detailed explanation-5: -Scientists use the term magma for molten rock that is underground and lava for molten rock that breaks through the Earth’s surface.