What was earth created by?

After our sun (star) formed some 4.5 billion years ago, it gathered all the gases and materials required to form all the planets, as well as the asteroids of the inner asteroid zone and the Kuiper belt beyond Pluto's orbit, within its gravitational field.

The earth and the other planets that had formed between 4.5 and 3.5 billion years ago were continuously bombarded by asteroids and comets. During those early years of formation, dust collided with dust, rocks with rocks, and even planets with planets. These collisions cause the release of large amounts of energy which meant for the four rocky inner planets they were little more than balls of molten rock.

The presence of water on Earth, Mars, Venus, and possibly the moon is thought to have originated from comets that collided with these planets billions of years ago; as the impact decreased, the earth cooled and started to take on its current form.

About 4.5 billion years ago, in the early solar system, cosmic dust and gas were attracted to one another by gravity and began to accumulate, forming Earth.