Question

Which layer of atmosphere protects the earth from meteoroids?

Answer 1

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Mesosphere protects earth from incoming meteorites.

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Answer 2

$\large\bf\color{Blue}{HELLO \: FRIEND \: HERE \: IS \: YOUR \: ANSWER,,,,,,}$

Meteoroid is formed up of debris and they are often called as pieces of interplanetary matter that are so small mostly smaller than a kilometer and most oftenly just in the size of millimeters. Meteoroids cause a "Meteor" which is seen as a sudden flash of light that we are usually observing it in a sky of nightfall. This happens due to the chunk of debris or chuck or piece of interplanetary debris to fall or descent into the Earth's atmosphere which in this process gets burnt up (all the matter). It's like a "make a wish" for the ones to fulfill their desires. Most of the Meteoroids which enter the Earth's atmospheric area of $\textbf{Mesosphere}$, when a large enough Meteoroid entrees this layer of atmosphere, the meteoroids already undergoing the process of burning and become so tiny that they fully vaporise and vanish in that layer. They never reach the Earth's surface. If a Meteoroid is successfully surviving the fall into the Earth's atmosphere they are regarded as $\textbf{Meteorite}$.

The meteorites can be larger than expected (most of them are really small though) like for about from 1 gram or at a size of a pebble stone to 120 kilograms to a extremely high boulder so big that can destroy the Earth's surface (or land). The Mesosphere is also regarded as the most chilly and coldest region which approximates towards -100°C !. This layer is used for studying the meteorological conditions of the Earth and to predict weather and also for measuring temperatures by sending out unmanned balloon usually led by a team of scientists. Burning of the meteoroids is caused by frictions between the layer if it comes around 85 kilometers of distance.

$\textbf{Asteroids}$ which are formed around the Asteroid Belt, are more larger pieces or chunks formed with composition of rocks, chemicals, minerals, etc. are the ones which could spell a disaster for Earth's fate as they are capable enough of causing extinction (famous example will be extinction of Dinosaurs, the large reptilian creatures which inhabited the Earth in Triassic and more importantly Jurassic Periods).

$\bf\color{Red}{HOPE \: IT \: HELPS \: AND \: GIVES \: YOU \: A \: INSIGHT \: FOR \: MESOSPHERE, \: OUR \: IMPORTANT \: ATMOSPHERIC \: LAYER!!!!}$