<h2>Answer: False</h2>
The longest river in the world in is the Amazon, located in South America, with a length of 6800 kilometers, compared to 6695 of the Nile River.
It is understandable that for a long time it was believed that it was the Nile. However, a few years ago the Brazilian Institute of Geography and Statistics published an investigation claiming that the Amazon is the longest river in the world.
On the other hand, the Sahara Desert itself is the largest (warm) desert in the world, <u>but</u> the Antartic Desert occupies the first place with an area of 
compared to 
of the Sahara.
Taking into account that the definition of desert is a place with very little or no rainfall in the year.
<h2>Therefore this is false.</h2>
Got this from google, scientists count a species population by first knowing the population in a certain area or small geographical sample location then multiply the result by the total area.
<span>Infrared images are basically temperature maps of the land, water, and cloud-top surfaces "seen" by the satellite sensor. Very cold surfaces, such as high cloud tops emitting little infrared radiation, appear bright white . Surfaces with intermediate temperatures appear in gray shadings.
</span><span>The simple rule for Infrared (IR) images is: Warm temperatures appear in dark shades. Cold temperatures appear in light shades.</span>
Cliffs are very heavy rocks and when there is too much weight it can cause cracks that weakens the structural integrity which can cause the cliff to either collapse or give way, falling on the ground below which can kill people crush cars or block roads. Hope this helps :)
