Background: Surface temperature differences in turn cause pressure differences. A hot surface warms the air above it causing it to expand and lower the density and the resulting surface air pressure. The resulting horizontal pressure gradient moves the air from higher to lower pressure regions, creating a wind, and the Earth's rotation then causes deflection of this air flow due to the Coriolis effect. The simple systems thus formed can then display emergent behaviour to produce more complex systems and thus other weather phenomena.  Large scale examples include the Hadley cell while a smaller scale example would be coastal breezes.

Situation: Mark was visiting southern Africa as an exchange student. He was amazed by the beauty of Namib Desert, which is located mostly in Namibia. He kind of enjoyed the hot surface of the desert. Next to Namib desert is the grasslands of  Botswana. He noticed that the surface temperature was much lower there.

Question: Which place would have lower air density, Namib Desert or Grasslands in Botswana?
Answer: Namib Desert

Situation: Mark was visiting southern Africa as an exchange student. He was amazed by the beauty of Namib Desert, which is located mostly in Namibia. He kind of enjoyed the hot surface of the desert. Next to Namib desert is the grasslands of  Botswana. He noticed that the surface temperature was much lower there.

Question: Which place would have higher air density, Namib Desert or Grasslands in Botswana?
Answer: Grasslands in Botswana

Situation: Mark was visiting southern Africa as an exchange student. He was amazed by the beauty of Namib Desert, which is located mostly in Namibia. He kind of enjoyed the hot surface of the desert. Next to Namib desert is the grasslands of  Botswana. He noticed that the surface temperature was much lower there.

Question: Would the air density in Namib Desert be higher or lower than in Grasslands in Botswana?
Answer: lower

Situation: Mark was visiting southern Africa as an exchange student. He was amazed by the beauty of Namib Desert, which is located mostly in Namibia. He kind of enjoyed the hot surface of the desert. Next to Namib desert is the grasslands of  Botswana. He noticed that the surface temperature was much lower there.

Question: Would the air density in Grasslands in Botswana be higher or lower than in Namib Desert?
Answer: higher

Situation: Mark was visiting southern Africa as an exchange student. He was amazed by the beauty of Namib Desert, which is located mostly in Namibia. He kind of enjoyed the hot surface of the desert. Next to Namib desert is the grasslands of  Botswana. He noticed that the surface temperature was much lower there.

Question: Which place would have lower surface air pressure, Namibia or Botswana?
Answer: Namibia

Situation: Mark was visiting southern Africa as an exchange student. He was amazed by the beauty of Namib Desert, which is located mostly in Namibia. He kind of enjoyed the hot surface of the desert. Next to Namib desert is the grasslands of  Botswana. He noticed that the surface temperature was much lower there.

Question: Which place would have higher surface air pressure, Namibia or Botswana?
Answer: Botswana

Situation: Mark was visiting southern Africa as an exchange student. He was amazed by the beauty of Namib Desert, which is located mostly in Namibia. He kind of enjoyed the hot surface of the desert. Next to Namib desert is the grasslands of  Botswana. He noticed that the surface temperature was much lower there.

Question: Would Namibia have higher or lower surface air pressure than Botswana?
Answer: lower

Situation: Mark was visiting southern Africa as an exchange student. He was amazed by the beauty of Namib Desert, which is located mostly in Namibia. He kind of enjoyed the hot surface of the desert. Next to Namib desert is the grasslands of  Botswana. He noticed that the surface temperature was much lower there.

Question: Would Botswana have higher or lower surface air pressure than Namibia?
Answer: higher

Situation: Mark was visiting southern Africa as an exchange student. He was amazed by the beauty of Namib Desert, which is located mostly in Namibia. He kind of enjoyed the hot surface of the desert. Next to Namib desert is the grasslands of  Botswana. He noticed that the surface temperature was much lower there.

Question: Would air more likely or less likely flow form Namib Desert to Grasslands in Botswana?
Answer: less likely

Situation: Mark was visiting southern Africa as an exchange student. He was amazed by the beauty of Namib Desert, which is located mostly in Namibia. He kind of enjoyed the hot surface of the desert. Next to Namib desert is the grasslands of  Botswana. He noticed that the surface temperature was much lower there.

Question: Would air more likely or less likely flow form Grasslands in Botswana to Namib Desert?
Answer: more likely