Question

it is commonly said that wood floats because \it is lighter than water\ or that a stone sinks because it is \heavier than water\. are these accurate statements? explain.

multiple choice

○ no, these statements are not entirely accurate. a more precise explanation involves density. wood is less dense than water, while the density of the sinking rock is larger than that of water.

○ yes, these statements are perfectly accurate explanations. the weight of wood is indeed lighter than that of water, while the weight of a rock is heavier than that of water.

○ no. weight doesnt matter; objects with more surface area will float.

○ no. the viscosity of the surrounding fluid and atmospheric pressure are the only factors that determine if objects can float.

Explanation:

The key is density, not weight. A large piece of wood can be heavier than a small amount of water but still float (as wood’s density < water’s). A small stone can be lighter than a large volume of water but sink (stone’s density > water’s). The first option correctly links floating/sinking to density. Other options are wrong: weight alone isn’t the factor, surface area or viscosity/pressure don’t determine this.

Answer:

A. No, these statements are not entirely accurate. A more precise explanation involves density. Wood is less dense than water, while the density of the sinking rock is larger than that of water.