Question

an underground porous rock layer often saturated with water in the form of streams is called a(n) ______.
a) aquifer
b) continental shelf
c) fault line
d) aqueduct

______ is freshwater filtered through soil that originally came from rainfall and melted snow.
a) precipitation
b) groundwater
c) runoff
d) condensation

Explanation:

First Question:

• Option A: An aquifer is an underground layer of porous rock saturated with water (often in stream - like forms) that can yield water.
• Option B: A continental shelf is the submerged border of a continent, not related to underground water - bearing rock layers.
• Option C: A fault line is a fracture in the Earth's crust, not related to water - bearing rock layers.
• Option D: An aqueduct is a structure (usually man - made) for transporting water, not an underground rock layer.

• Option A: Precipitation is water in various forms (rain, snow, etc.) falling from the atmosphere, not water filtered through soil.
• Option B: Groundwater is freshwater that has seeped through soil and rock layers, and it originates from rainfall and melted snow.
• Option C: Runoff is water that flows over the land surface, not filtered through soil to become groundwater.
• Option D: Condensation is the process of water vapor turning into liquid water (like clouds forming), not related to water filtered through soil.

Answer:

A) aquifer

Second Question: