Chameleon Color Change Mechanisms

The video debunks the myth that chameleons change color to blend in with their environment. Instead, it explains that chameleons change color due to structural changes in their skin, specifically the spacing of nanoscale crystals, which affects the light wavelengths reflected. This discovery was made by physicists and biologists, revealing that chameleons use structural color rather than pigment dispersion. The video also highlights the role of infrared reflection in chameleon skin and concludes with a sponsorship message from Lynda.com.

What is the common misconception about why chameleons change color?

• To protect themselves from predators

• To blend in with their environment

• To communicate with other animals

• To regulate their body temperature

What was the traditional belief about how chameleons change color?

• By spreading out colored pigments in their cells

• By changing the spacing of crystals in their skin

• By reflecting infrared light

• By altering their body temperature

According to new research, what actually causes the color change in chameleons?

• The reflection of ultraviolet light

• The presence of green pigments

• The dispersion of melanin

• The spacing of nanoscale crystals

How do chameleons change their color from green to red?

• By compressing the crystals in their skin

• By absorbing more sunlight

• By spreading out red pigments

• By increasing the spacing between crystals

What happens to the crystal spacing in a chameleon's skin when it is excited?

• The spacing increases

• The spacing remains the same

• The crystals disappear

• The spacing decreases

What is the primary color reflected by the nanoscale crystals in a calm chameleon?

• Red

• Yellow

• Blue

• Green

How do chameleons achieve a green appearance?

• By reflecting only yellow light

• By absorbing red light

• By spreading green pigments

• By combining yellow pigment with blue light reflection

What is the function of the additional layer of crystals in chameleon skin?

• To reflect visible light

• To absorb ultraviolet light

• To reflect infrared light

• To produce melanin

What is the role of the larger, more disorganized crystals in chameleon skin?

• They regulate body temperature

• They reflect longer wavelengths in the infrared spectrum

• They produce green pigments

• They absorb visible light

What is the significance of the new findings about chameleon color change?

• They prove that chameleons are colorblind

• They confirm the role of pigments in color change

• They highlight the importance of structural color

• They show that chameleons use ultraviolet light