Question

earth and other planets formed as clumps of dust, ice, and rock gained mass and pulled in more matter due to gravity.
gravitational collapse occurred in a dense area of gas and dust within the solar nebula.
a large cloud of gas and dust left over from the suns formation rotated and flattened.
the newly formed protostar gathered matter due to gravity, which increased its internal pressure and temperature.
matter within the protoplanetary disk condensed into clumps.
hydrogen atoms in the protostars core fused together to form helium atoms, transforming the protostar into a star, the sun.

Explanation:

This is a task to order the steps of solar system formation chronologically, starting from the initial cloud, proceeding to protostar formation, star ignition, disk formation, clump condensation, and finally planet formation.

Answer:

1. Gravitational collapse occurred in a dense area of gas and dust within the solar nebula.
2. A large cloud of gas and dust left over from the Sun's formation rotated and flattened.
3. The newly formed protostar gathered matter due to gravity, which increased its internal pressure and temperature.
4. Hydrogen atoms in the protostar's core fused together to form helium atoms, transforming the protostar into a star, the Sun.
5. Matter within the protoplanetary disk condensed into clumps.
6. Earth and other planets formed as clumps of dust, ice, and rock gained mass and pulled in more matter due to gravity.