Geology Quiz: Test Your Knowledge about Rock Layers

Which type of rock makes up the outer layer of the Earth's crust? (1 point)

A) Sedimentary rocks
B) Igneous rocks
C) Metamorphic rocks
D) None of the above

Answer:

The correct answer is A) Sedimentary rocks.

The outer layer of the Earth's crust is mainly composed of sedimentary rocks. These rocks are formed through the accumulation and compression of sediment over time. They cover a wide range of geological processes, including erosion, deposition, and compaction.

Sedimentary rocks are important in understanding the Earth's history as they contain clues about past environments and life forms. They often contain fossils that provide valuable information about ancient ecosystems and climate conditions.

Examples of sedimentary rocks include limestone, sandstone, shale, and conglomerate. These rocks are typically found in layers or strata, which can reveal information about the sequence of events that occurred during their formation.

Overall, sedimentary rocks play a crucial role in the study of geology and help scientists unravel the complex history of our planet.