The Scientist That Discovered That All Matter Is Made Up

question 20

Multiple Choice

The scientist that discovered that all matter is made up of atoms too small to be seen was:

• A) J.J. Thompson.
• B) Niels Bohr.
• C) Democritus.
• D) John Dalton.

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Definitions:

Opponent-process Theory

A theory in psychology that explains emotional reactions to stimuli, positing that emotions are followed by opposite emotional states.

Negative Afterimages

Visual illusions that occur after looking at a brightly colored object for a prolonged period and then looking away, resulting in seeing the complementary color.

Tinted Glasses

Eyewear with lenses that are colored or darkened to reduce brightness and protect the eyes from glare.

Trichromatic Theory

A theory of color vision that states the human eye has three types of receptors with differing sensitivities to light wavelengths, corresponding to red, green, and blue colors.