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Understanding Wells

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Questions and Answers

What is the purpose of digging a well?

To test the water table
To access natural resources (correct)
To create underground pools
To find where water is not available

Why were the first wells likely dug by hand or with very simple tools?

Due to the lack of advanced technology at that time (correct)
To make the process faster
Because advanced tools were reserved for the wealthy
As a tradition in that era

What is the water table?

An underground pool of water
A measurement of the amount of water in a well
A line separating soil and water underground (correct)
A tool used to dig wells

Why do wells provide a reliable source of clean water?

They tap into underground freshwater pools (C) Signup and view all the answers

How are most wells made today?

By drilling (B) Signup and view all the answers

What is the purpose of adding a casing to a well shaft?

To prevent the shaft from caving in (B) Signup and view all the answers

Which type of well is most likely to become contaminated due to its shallow depth?

Dug well (A) Signup and view all the answers

What distinguishes an artesian well from other types of wells?

It has natural pressure forcing the water up (D) Signup and view all the answers

What is the defining characteristic of a driven well?

It is made by driving a pipe into sand or gravel (C) Signup and view all the answers

Why are drilled wells ideal when clay or other types of rock are above the water table?

Because they can be drilled to great depths (D) Signup and view all the answers

What is the main advantage of an artesian well?

It provides water without the need for a pump. (A) Signup and view all the answers

Which type of well is at a higher risk of contamination and drying up during a drought?

Unconfined well (B) Signup and view all the answers

What is the purpose of the specially designed filters used in some wells?

To allow water in while keeping out sand, dirt, and debris. (D) Signup and view all the answers

What is the concern surrounding the development of the cone of depression?

It can lower the water table around the well, reducing the water supply. (A) Signup and view all the answers

How can the issue of the cone of depression be managed?

By limiting the amount of water taken from the well, especially during droughts. (A) Signup and view all the answers