Question

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7 multiple choice 2 points
acidic rainwater dissolving limestone rock may lead to:
the creation of a cave
physical weathering
oxidation
liquefaction
8 multiple choice 2 points
the famous rock pillars of monument valley (found in the navajo nation on the border of utah and arizona) are most likely the result of ___.
image of monument valley rock pillars
solifluction
differential weathering
faulting

Explanation:

• Question 7: Acidic rainwater dissolving limestone is a chemical process. Physical weathering involves mechanical breakdown (e.g., freezing - thawing), oxidation is a chemical reaction with oxygen (not relevant here), and liquefaction is related to soil behavior during earthquakes. Acidic rain dissolving limestone can create caves through chemical weathering (a type of chemical process that can lead to cave formation).
• Question 8: Solifluction is the slow down - slope movement of water - saturated soil. Faulting is related to fractures in the Earth's crust due to tectonic forces. Monument Valley's rock pillars are formed by differential weathering. Different rock layers in the area weather at different rates. Softer layers erode more quickly, leaving behind the more resistant rock pillars.

Answer:

1. the creation of a cave
2. differential weathering