Capillary Action Quiz
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Questions and Answers

What is the primary driving force behind capillary action?

  • Chemical reactions and molecular weight
  • Temperature and viscosity
  • Surface tension and adhesive forces (correct)
  • Gravity and external pressure

    • What is the origin of the term 'capillary'?

  • Latin word meaning 'of or resembling hair' (correct)
  • German term for 'liquid adhesion'
  • Greek word for 'liquid flow'
  • Arabic term for 'narrow space'

    • Which material does NOT demonstrate capillary action?

  • Porous paper
  • Liquefied carbon fiber
  • Non-porous sand (correct)
  • Thin straw

    • Who was the first recorded person to observe capillary action?

    <p>Leonardo da Vinci</p> Signup and view all the answers

    What did Robert Boyle report about capillary action in 1660?

    <p>Some inquisitive French Men observed water ascending in a capillary tube</p> Signup and view all the answers

    What is the primary cause of capillary action?

    <p>Surface tension and adhesive forces between the liquid and container wall</p> Signup and view all the answers

    What did Robert Boyle report about capillary action in 1660?

    <p>He reported that 'some inquisitive French Men' observed water ascending in a capillary tube</p> Signup and view all the answers

    What is the etymology of the term 'capillary'?

    <p>It comes from the Latin word 'capillaris', meaning 'of or resembling hair'</p> Signup and view all the answers

    What did Leonardo da Vinci contribute to the understanding of capillary action?

    <p>He made the first recorded observation of capillary action</p> Signup and view all the answers

    Which materials demonstrate capillary action?

    <p>Paper, plaster, sand, and biological cells</p> Signup and view all the answers

    Study Notes

    Capillary Action Overview

    • Primary driving force behind capillary action is the combination of adhesion (attraction to the surface of a material) and cohesion (attraction between similar molecules).
    • In fluids, capillary action is observed when liquid rises or falls in a narrow space or tube.

    Origin of the Term 'Capillary'

    • The term 'capillary' originates from the Latin word "capillaris," meaning "hair-like," which reflects the narrow tubes and spaces involved in this phenomenon.

    Materials and Capillary Action

    • Materials that demonstrate capillary action include water, alcohol, and mercury; however, mercury has a different behavior due to its cohesive properties.
    • Materials that do NOT demonstrate capillary action include non-polar liquids like oils that do not adhere well to surfaces.

    Historical Observations

    • The first recorded observation of capillary action is attributed to Leonardo da Vinci, who studied its effects in liquids.
    • Robert Boyle reported on capillary action in 1660, noting its significance in the movement of liquids in tubes and soils, contributing to early scientific understanding.

    Causes of Capillary Action

    • The primary cause of capillary action is surface tension, which arises from the cohesive forces within a liquid, coupled with adhesive forces acting between the liquid and the surrounding material.

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    Description

    Test your knowledge on the phenomenon of capillary action, where liquids flow in narrow spaces without external forces. Learn about its applications in various materials and how it is observed in everyday objects.

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