Groundwater Importance and Distribution
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Questions and Answers

What makes up most of Earth's liquid freshwater?

  • Lakes
  • Streams
  • Rivers
  • Groundwater (correct)

Which soil type is mentioned as being really good at soaking up water?

  • Silt
  • Clay
  • Sand (correct)
  • Rocks

What is the region where the soil is not saturated with water called?

  • Water table
  • Unsaturated zone (correct)
  • Soil moisture
  • Saturated zone

What fills the bottom of a hole when it reaches the saturated zone?

<p>Water (A)</p> Signup and view all the answers

Where can you observe the boundary between the saturated and unsaturated zones?

<p>At the water table (C)</p> Signup and view all the answers

What is the role of groundwater in the water cycle?

<p>Groundwater is an important component of the water cycle (D)</p> Signup and view all the answers

Which zone is literally saturated with water?

<p>Saturated zone (A)</p> Signup and view all the answers

How do geysers form?

<p>When groundwater is heated by magma underground, the pressure builds up and the water escapes at the surface as steam (B)</p> Signup and view all the answers

How do aquifers function as underground water reservoirs?

<p>Aquifers act like giant rock sponges, soaking up and holding water for thousands of years (A)</p> Signup and view all the answers

What is the primary role of groundwater in forming sedimentary rocks?

<p>Groundwater acts as a cementing agent, gluing sediments together over millions of years (A)</p> Signup and view all the answers

Why are sinkholes formed when groundwater is over-pumped?

<p>Sinkholes form because the land above sinks when groundwater is removed, creating cavities (A)</p> Signup and view all the answers

What role does groundwater play in natural ecosystems?

<p>Groundwater is a source of freshwater for surface water systems like wetlands and rivers (A)</p> Signup and view all the answers

How are caves different from sinkholes?

<p>Caves are typically smaller than sinkholes and have connections to other underground spaces like caverns (A)</p> Signup and view all the answers

What happens when the water underground is heated by magma near the surface?

<p>The pressure builds up and sometimes results in escaping steam, forming geysers (A)</p> Signup and view all the answers

What is the primary function of aquifers in storing groundwater?

<p>Aquifers function to soak up water like sponges and hold it for long periods of time (D)</p> Signup and view all the answers

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