From having worked in the tropics a little, I would say that tropical conditions can be ideal for chemical weathering of granite, sandstone and shale. A combination of the heat, and considerable water or rain in the rainy season allows the chemicals to attack the mineral grains especially the feldspars and convert them to clay. Saprolitic soils can form from such decomposition.
Explanation:
the Moon is considered not to have an atmosphere because it cannot absorb measurable quantities of radiation, does not appear layered or self-circulating, and requires constant replenishment due to the high rate at which its gases get lost into space.
Answer: Canada has mountains, plains, lakes, valleys, and rivers. :)
The Earth is massive enough that the pull of gravity maintains its roughly spherical shape. Most of its deviation from spherical stems from the centrifugal force caused by rotation around its north-south axis. This force deforms the sphere into an oblate ellipsoid