Question

aim: date: the block diagram below shows a cross - section of a landscape. letters a, b, c, d, and e represent different rock layers. 6. which rock layers appear to be most resistant to weathering? a. a and b b. b and d c. c, d, and e d. a, c, and e the cross - section below shows rock layers that underwent crustal movement during an igneous intrusion in the cretaceous period. 7. which statement best describes the cause of the ridges shown? a. the rock layers were evenly weathered. b. some rock layers were more resistant to weathering and erosion. c. the igneous intrusion flowed over the surface. d. more deposition occurred at the ridge sites after uplift. 8. which rock will weather at the fastest rate when exposed to acid rain? a. granite b. limestone c. gneiss d. quartzite 9. what occurs when rock particles are crushed into smaller fragments? o the total surface area __________ (increases/decreases/remains constant). o the chemical composition of the rock __________ (changes/remains the same).

Explanation:

1. Resistant rock layers show less erosion. In the diagram, C, D and E have less - eroded shapes compared to others, indicating higher resistance to weathering.
2. Ridges form when some rock layers are more resistant to weathering and erosion, remaining elevated while surrounding softer rocks erode away.
3. Limestone reacts with acid rain due to its calcium - carbonate content, weathering faster than granite, gneiss, and quartzite.
4. When rock particles are crushed into smaller fragments, the total surface area increases as more surfaces are exposed. The chemical composition remains the same as no chemical reactions are occurring just by physical crushing.

Answer:

1. C. C, D, and E
2. B. Some rock layers were more resistant to weathering and erosion.
3. B. limestone
4. The total surface area increases. The chemical composition of the rock remains the same.