science
Grade-4-
Easy

Question

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

  1. Conglomerate
  2. Sandstone
  3. Limestone
  4. Obsidian

hintHint:

The obsidian rock looks smooth and black.

The correct answer is: Obsidian


    • The obsidian rock looks smooth and black.
    • It has a glassy texture which has a smooth surface.
    • It is an extrusive igneous rock.

    Related Questions to study

    Grade-4-
    science

    Study of the Earth is done by___________.

    Study of the Earth is done by___________.

    scienceGrade-4-
    Grade-4-
    science

    Formation of coal takes place from________.

    Formation of coal takes place from________.

    scienceGrade-4-
    Grade-4-
    science

    Basalt is a __________.

    Basalt is a __________.

    scienceGrade-4-
    parallel
    Grade-4-
    science

    __________ type of currents can transfer sediments.

    __________ type of currents can transfer sediments.

    scienceGrade-4-
    Grade-4-
    science

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

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

    scienceGrade-4-
    Grade-4-
    science

    Which of the following statement is false about the photo shown below.

    Which of the following statement is false about the photo shown below.

    scienceGrade-4-
    parallel
    Grade-4-
    science

    Read the following data and select the rock that shows light brown particles.

    Read the following data and select the rock that shows light brown particles.

    scienceGrade-4-
    Grade-4-
    science

    Which of the following statement is correct?

    Which of the following statement is correct?

    scienceGrade-4-
    Grade-4-
    science

    Fossils are mostly found in __________.

    Fossils are mostly found in __________.

    scienceGrade-4-
    parallel
    Grade-4-
    science

    Which is the oldest rock in the image?

    Which is the oldest rock in the image?

    scienceGrade-4-
    Grade-4-
    science

    _________ show delicate parts of insects or plant.

    _________ show delicate parts of insects or plant.

    scienceGrade-4-
    Grade-4-
    science

    Select the correct option that shows the rock layers listed in the order from oldest to newest.

    Select the correct option that shows the rock layers listed in the order from oldest to newest.

    scienceGrade-4-
    parallel
    Grade-4-
    science

    Which of the following rocks are formed from lava or magma?

    Which of the following rocks are formed from lava or magma?

    scienceGrade-4-
    Grade-4-
    science

    Which of the following factor changes landforms?

    Which of the following factor changes landforms?

    scienceGrade-4-
    Grade-4-
    science

    Which of the following rock is youngest