Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Why has the earth got cracks?

2 Answers

  • 1 decade ago
    Favorite Answer

    Depends on scale:

    Dry lake beds are cracked because soil shrinks when the water evaporates.

    Mountains crack when weathering weakens the rocks and they break apart by their own weight.

    Volcanoes can cause expansion or contraction under ground causing cracks to form.

    Continents push every which way and causes cracks where they meet.

    Oceanic trenches are sort of inverse cracks where upwelling materials form new lithospheric plate material.

    And large meteorites can impact the planet and crack the mantel usually resulting in mass extinctions of life on earth.

  • Anonymous
    1 decade ago

    it is due to a phenonmena called contenantel drift.the contenants are moving all the time.

Still have questions? Get your answers by asking now.