Which planet in our solar system is the smallest, both in size and mass?

Explanation

Mercury is the smallest planet in our solar system, both in overall size and mass, as well as being the closest planet to the sun. Despite its proximity to the sun, Mercury experiences extreme temperature swings between day and night because it lacks a substantial atmosphere to help retain heat or provide insulation. Pluto, while smaller than Mercury, is no longer classified as a full planet, having been reclassified as a dwarf planet in 2006. Explore more Everyday Science MCQs on mcqstutor to keep practicing.