science
Grade-4-
Easy

Question

Which of the following rock is looks smooth and black in color?

  1. Granite
  2. Quartzite
  3. Limestone
  4. Obsidian

hintHint:

Obsidian rock is soft and looks black in color.

The correct answer is: Obsidian


    • Obsidian rock is an extrusive rock.
    • It is formed by the cooling and crystallization of magma on the surface of the earth's crust.
    • So it is soft and black in color.

    Related Questions to study

    Grade-4-
    science

    Study of earth is done by___________.

    Study of earth is done by___________.

    scienceGrade-4-
    Grade-4-
    science

    Scoria is a________.

    Scoria is a________.

    scienceGrade-4-
    Grade-4-
    science

    Basalt is a __________.

    Basalt is a __________.

    scienceGrade-4-
    parallel
    Grade-4-
    science

    Scientists classify rocks on the basis of their______

    Scientists classify rocks on the basis of their______

    scienceGrade-4-
    Grade-4-
    science

    ______ is the earth’s outer core.

    ______ is the earth’s outer core.

    scienceGrade-4-
    Grade-4-
    science

    A rock is _____ and _______.

    A rock is _____ and _______.

    scienceGrade-4-
    parallel
    Grade-4-
    science

    Earth is the ________ planet from the sun.

    Earth is the ________ planet from the sun.

    scienceGrade-4-
    Grade-4-
    science

    _______type of rock is formed when melted rock cools and harden.

    _______type of rock is formed when melted rock cools and harden.

    scienceGrade-4-
    Grade-4-
    science

    ________ contains highest mountains and deep oceans.

    ________ contains highest mountains and deep oceans.

    scienceGrade-4-
    parallel
    Grade-4-
    science

    In the given diagram, _______ is a crust.

    In the given diagram, _______ is a crust.

    scienceGrade-4-
    Grade-4-
    science

    ________ layer of the earth is the fourth layer from the surface.

    ________ layer of the earth is the fourth layer from the surface.

    scienceGrade-4-
    Grade-4-
    science

    Earth’s majority of plants are present in__________.

    Earth’s majority of plants are present in__________.

    scienceGrade-4-
    parallel
    Grade-4-
    science

    The given image belongs to ________________.

    The given image belongs to ________________.

    scienceGrade-4-
    Grade-4-
    science

    Inner core is made up of solid material because

    Inner core is made up of solid material because

    scienceGrade-4-
    Grade-4-
    science

    _______ creates a magnetic field around the earth.

    _______ creates a magnetic field around the earth.

    scienceGrade-4-
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.