273. The most important force that provide resistance to particles towards entertainment is

frictional resistance
particle cohesive bonds
particle adhesive bonds
momentum

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particles towards entertainment is" class="read-more button" href="https://exam.pscnotes.com/mcq/the-most-important-force-that-provide-resistance-to-particles-towards-entertainment-is/#more-43832">Detailed SolutionThe most important force that provide resistance to particles towards entertainment is

class="screen-reader-text">The reaction between compounds and oxygen is called

275. The ionosphere contains ionized air that protects the earth from

the ultraviolet rays of the sun
the infrared rays of the sun
the falling meteorites
None of the above

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xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512"> Subscribe on YouTube title="The ionosphere contains ionized air that protects the earth from" class="read-more button" href="https://exam.pscnotes.com/mcq/the-ionosphere-contains-ionized-air-that-protects-the-earth-from/#more-43464">Detailed SolutionThe ionosphere contains ionized air that protects the earth from

276. The heavier silicates named as ‘Sima’ or silica + magnesium are most abundant in the

crust
core
mantle
ocean floors

Detailed SolutionThe heavier silicates named

as ‘Sima’ or silica + magnesium are most abundant in the

277. The slow down slope movement of soil and sediment because of frost heaving and thawing is called

solifluction
gelifluction
frost creep
rockfall

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and thawing is called" class="read-more button" href="https://exam.pscnotes.com/mcq/the-slow-down-slope-movement-of-soil-and-sediment-because-of-frost-heaving-and-thawing-is-called/#more-43384">Detailed SolutionThe slow down slope movement of soil and sediment because of frost heaving and thawing is called

278. The oldest rocks found in ocean basins are ____ than the oldest continental rocks.

older
younger
larger
smaller

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class="read-more button" href="https://exam.pscnotes.com/mcq/the-oldest-rocks-found-in-ocean-basins-are-____-than-the-oldest-continental-rocks/#more-43382">Detailed SolutionThe oldest rocks found in ocean basins are ____ than the oldest continental rocks.

279. The mountains that separate European and Arctic Russia are

the Pyranees
the Balkans
the Carpathians
the Urals

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576 512"> Subscribe on YouTube button" href="https://exam.pscnotes.com/mcq/the-mountains-that-separate-european-and-arctic-russia-are/#more-43364">Detailed SolutionThe mountains that separate European and Arctic Russia are

280. The steady or initial phase of the magnetic storms is

preceded by storm sudden commencement
magnetic storm at middle and low altitudes
a sharp increase of the field
None of the above

Detailed SolutionThe steady or initial phase of the magnetic storms is


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