All Free Everyday Science MCQs with Answers

691. Ibex is a wild alpine ________ found in Himalaya?

• A. Dog
• B. Hen
• C. Sheep
• D. Goat

Explanation: An ibex is a wild mountain goat with large curved horns, adapted to rocky alpine regions such as the Himalayas. It is not a sheep, although both are hoofed ruminants.

692. Highest Clouds are ___________?

• A. Cirrocumulus
• B. Cirrus
• C. Cirrostratus
• D. All of these Science

Explanation: Cirrus, cirrocumulus and cirrostratus are all classified as high-level clouds, generally forming at great heights in the troposphere. Therefore, all the listed cloud types fit.

693. Marble and Slate are which type of rock?

• A. Igneous
• B. Sedimentary
• C. Metamorphic
• D. Non of These

Explanation: Marble forms when limestone is changed by heat and pressure, while slate forms mainly from shale under low-grade metamorphism. Both are therefore metamorphic rocks.

694. Coldest point in atmosphere is?

• A. Tropopause
• B. Mesopause
• C. Exopause
• D. None of these

Explanation: The mesopause is generally the coldest atmospheric boundary, with temperatures that can fall near minus 90°C. Above it, temperatures rise again in the thermosphere.

695. The material that comes out of a volcano at the time of eruption is:

• A. Solid, liquid, gaseous
• B. Solid and liquid
• C. Solid and gaseous
• D. None of these

Explanation: A volcanic eruption can release solid ash and rock fragments, liquid lava, and gases such as steam and carbon dioxide. Hence all three physical states are represented.

696. Earthquakes are caused by:

• A. Landslide
• B. Eruption of volcanoes
• C. Tectonic plates
• D. All of these

Explanation: Most earthquakes result from sudden movement of tectonic plates, but volcanic eruptions and landslides can also produce earthquakes. Thus all the listed processes can be causes.

697. Mouna Loa is an example of?

• A. Active volcano
• B. Extinct volcano
• C. Plateau in volcanic region
• D. None of these

Explanation: Mauna Loa in Hawaii is an active shield volcano that has erupted repeatedly in historical times. It is not extinct or merely a plateau.

698. Atmospheric pressure at sea level is _______?

• A. 746 mm
• B. 760 mm
• C. 820 mm
• D. None of these

Explanation: Standard atmospheric pressure at mean sea level is 760 mm of mercury, equivalent to one atmosphere or about 101.3 kilopascals. The value changes with altitude and weather, but 760 mm is the standard reference.

699. Ozone layer thickness is measured in____________?

• A. Metre
• B. Joule
• C. Pounds
• D. Dobson

Explanation: The amount of ozone in the atmosphere is measured in Dobson units, with one Dobson unit representing a very thin layer of pure ozone under standard conditions. Metre measures length, not atmospheric ozone concentration.

700. Which of the following is cold current ?

• A. Gulf Stream
• B. Brazil
• C. Benguela
• D. Kuroshio

Explanation: The Benguela Current is a cold current flowing northward along the southwest coast of Africa. The Gulf Stream, Brazil, and Kuroshio currents are warm currents.