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Rocks buried deep underground must do what before they are weathered or eroded?

Rocks buried deep underground must be uplifted to the surface before they can be weathered or eroded. This uplift can happen through tectonic movements, erosion of overlying rocks, or other geological processes that bring the rocks closer to the Earth's surface. Once at the surface, rocks are exposed to weathering processes such as wind, water, and ice that break them down over time.


In order to form magma what must happen to sedimentary metamorphic or igneous rocks?

In order to form magma, sedimentary, metamorphic, or igneous rocks must be exposed to high temperatures and pressures deep within the Earth's crust. This process causes the rocks to partially melt, forming molten rock called magma.


Why sedimentary rocks could not have been the first rocks on earth?

Sedimentary rocks form from the accumulation of sediment such as sand, silt, or clay. For sedimentary rocks to form, there must be pre-existing rocks that weather and erode to produce sediment. Therefore, sedimentary rocks could not have been the first rocks on Earth as they require the presence of older rocks to form.


What must happen first for soil to form'?

The weathering of rocks must first occur, breaking down rocks into smaller particles. These particles then mix with organic matter and other materials, undergoing physical, chemical, and biological processes to form soil.


Why must the earth be older than its oldest rocks?

Two points here: rocks are solidified material--early Earth was molten. The first rocks appeared after the molten Earth cooled somewhat. Secondly, Earth's rocks are constantly being recycled through the 'rock cycle'. The oldest rocks on Earth have somehow survived those recycling efforts, but no rock found on Earth (other than some meteorites) is as old as the planet.