Question

question: liquids form a flat or slightly curved upper surface when acted upon by ______. answer input: spelling counts but capitalization doesnt

Explanation:

Liquids form a flat or slightly curved (meniscus) upper surface when acted upon by gravity (and sometimes surface tension, but gravity is the primary factor for the flat/slightly curved shape in containers, like in a beaker or graduated cylinder, where gravity pulls the liquid down and the container's walls and surface tension interact, but the main force leading to the flat or curved upper surface in the context of typical liquid behavior in containers is gravity).

Answer:

gravity