Why Can't You Directly Observe, with the Unaided Eye, Brownian

question 23

Multiple Choice

Why can't you directly observe, with the unaided eye, Brownian motion in easily visible objects such as floating bits of paper?

• A) Because bits of paper are so massive [or heavy] that they do not respond noticeably to atomic impacts.
• B) Because paper cannot be electrically charged, so it cannot respond to Brownian forces by individual atoms.
• C) Because atoms are so small that you can't see them with the unaided eye.
• D) Because only living organisms such as bacteria exhibit Brownian motion.
• E) Because only individual atoms and molecules exhibit Brownian motion.

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Definitions:

Figurative Art

Art that represents real-world objects or subjects, not abstract concepts, often emphasizing the human form or other recognizable figures.

Cave Paintings

Prehistoric drawings or paintings found on cave walls, often depicting animals or humans, and considered significant in the study of human history and art.

Fossil Record

The accumulation of all discovered fossils and their placement in rock formations and sedimentary layers, which provides information about past life on Earth.

Early Human Populations

Groups of the earliest Homo sapiens and their predecessors, whose movements, adaptations, and cultural developments shaped human evolution.