1. What would be the most likely result if water flowing through a thick layer of compacted sand contained no dissolved minerals?
- A. The sand would immediately turn into metamorphic rock.
- B. The sand grains would melt and fuse together.
- C. The sand would remain a loose, unconsolidated deposit.
- D. The water pressure would be enough to form a very strong rock.
2. How does cementation complete the transformation of sediment into sedimentary rock?
- A. By increasing the pressure on the particles
- B. By solidifying the loose particles
- C. By sorting the particles by size
- D. By rounding the edges of the particles
3. What is the direct and final product formed by the cementation of sediment grains?
- A. A metamorphic rock
- B. A sedimentary rock
- C. A collection of loose crystals
- D. A layer of compacted soil
4. What is the primary role of cementation in the formation of sedimentary rock?
- A. To break down large rocks into smaller pieces through weathering.
- B. To transport sediments from one location to another using water or wind.
- C. To press layers of sediment together using the weight of overlying materials.
- D. To bind loose sediment grains together into a solid mass using crystallized minerals.
5. During the process of cementation, what substance acts as the 'natural glue' that binds sediments together?
- A. Heat and pressure from deep within the Earth
- B. Organic matter from decaying plants and animals
- C. Dissolved minerals that crystallize in pore spaces
- D. The water itself as it freezes and expands
6. In the formation of sedimentary rock, what is the process of "compaction"?
- A. The chemical dissolution of unstable minerals within a sediment layer.
- B. The pressing of sediments together by the weight of layers above them.
- C. The crystallization of minerals in the spaces between sediment grains, which glues them together.
- D. The transportation of loose sand and silt by wind or water over long distances.
7. What is the primary force responsible for the compaction of sediments?
- A. The pressure from volcanic activity below the Earth's surface.
- B. The weight of the overlying layers of newly deposited sediment.
- C. The chemical reactions between different types of sediment grains.
- D. The movement of tectonic plates pushing against each other.
8. As sediments undergo compaction, what is the main physical change that occurs within the layer?
- A. The sediment grains grow larger in size.
- B. The chemical makeup of the grains is altered by heat.
- C. The empty space between the grains is reduced.
- D. The overall density of the layer decreases.
9. While compaction makes sediment layers dense, what else is required to turn the compacted sediment into a solid, hard rock?
- A. A binding agent
- B. Exposure to sunlight
- C. Further pressure
- D. Rapid cooling
10. What happens to an existing layer of buried sediment when a large amount of new sediment is deposited on top of it?
- A. The pressure on it decreases.
- B. Its grains begin to melt.
- C. Its compaction increases.
- D. It becomes less dense.