EVERYDAY SCIENCE

SCIENCE

EARTH SCIENCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which is the BEST evidence that rocks found deep underground were once exposed at the surface?
A
The rocks have been melted by a magma.
B
The rocks have been broken by faults.
C
The rocks have been weathered by water
D
The rocks have been folded by pressure.
Explanation: 

Detailed explanation-1: -Q. Which is the BEST evidence that rocks found deep underground were once exposed at the surface? The rocks have been melted by a magma.

Detailed explanation-2: -Once exposed, they are weathered, both physically (by mechanical breaking of the rock) and chemically (by weathering of the minerals), and the weathering products-mostly small rock and mineral fragments-are eroded, transported, and then deposited as sediments.

Detailed explanation-3: -Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. Once a rock has been broken down, a process called erosion transports the bits of rock and mineral away. No rock on Earth is hard enough to resist the forces of weathering and erosion.

Detailed explanation-4: -Weathering (breaking down rock) and erosion (transporting rock material) at or near the earth’s surface breaks down rocks into small and smaller pieces. These smaller pieces of rock (such as sand, silt, or mud) can be deposited as sediments that, after hardening, or lithifying, become sedimentary rocks.

Detailed explanation-5: -Mudstone, shale, and limestone are examples of sedimentary rock likely to contain fossils. As the layers of sediment build up on top of one another, they create a physical timeline. The oldest layers, along with the organisms that were fossilized as they formed, are deepest. The youngest layers are found at the top.

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