Video Transcript
What is the correct order for the
following statements to explain how sedimentary rocks are formed? (A) As these layers increase, the
pressure on the bottom layers increases. (B) The small pieces of rock are
transported, typically by water in rivers or seas. (C) The increased pressure removes
water from the layers and cements them together, forming sedimentary rock. (D) Igneous, sedimentary, and
metamorphic rocks are fragmented and disintegrated. (E) More and more rock, sand, and
mud is deposited on top of each other, forming layers. (F) The small pieces of rock are
then deposited.
Sedimentary rocks are rocks formed
when existing rocks go through a series of processes. Each of the statements given,
describes one of the steps necessary for forming sedimentary rocks. We need to put these statements in
the correct order. We can use this diagram to help us
understand how sedimentary rocks are formed.
First, rocks on the surface are
weathered and eroded. During weathering, existing
igneous, sedimentary, and metamorphic rocks are fragmented and disintegrated into
smaller particles of rock or sediment. This first step corresponds to
statement (D).
Next, the bits of rock and sediment
are transported by air or water in rivers and seas. The second step corresponds with
statement (B).
The next step is deposition. This is where the sediment is
deposited into a layer. This step corresponds with
statement (F).
The processes of weathering,
transportation, and deposition repeat, creating more and more layers of
sediment. This step corresponds with
statement (E).
As the layers increase, the
pressure on the bottom layers increases and the sediment is compacted. This step corresponds with
statement (A).
The increased pressure also removes
water from the layers, cementing the layers together. This produces sedimentary rock. This final step corresponds with
statement (C).
So, the correct order of the
statements to explain how sedimentary rocks are formed is (D), (B), (F), (E), (A),
(C).
