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(Says I have to cite my sources so here goes: I just copy/pasted your question into Google lol)
Answer:
The Gobi Desert is the largest desert in Asia.
Explanation:
It covers 500,000 square miles, extending from northern China into Mongolia
Differences between the Troposphere and the Stratosphere:
The troposphere is the lowest level of the atmosphere, so it is in contact with the Earth’s surface. In contrast, the stratosphere is located above the troposphere, so it is not in contact with the Earth’s surface. Humans live in the troposphere, not the stratosphere. People only spend time in the stratosphere is when they are traveling through it on an airplane, or flying through it while riding in a rocket. The air density and air pressure are much lower in the stratosphere. In fact, stratospheric air is too thin for people to be able to survive without pressurized air to breathe.
Gobi desert; yellow sand; yellow river
There is a grand total of 196 countries in the world. Hope this helped.