Color temperature in light sources is a measurement of heat in degrees Kelvin (K). Color temperatures over 5,000 K, the hottest, are sensed as sharp, clear blue-white. In contradictory language the color of light delivered by this hot radiation is referred to as “cool.” Temperatures around 2,700–3,000 K, actually cooler, are perceived as warm in color, tilting toward yellow and red. The heat- light- color relationship is recognized in colloquial language; something that is “white- hot” is dangerously hotter than something “red- hot.”
1. The author uses the phrase In contradictory language (Highlighted) in the passage in order to do what?(A) To alert readers to the fact that something strange is about to be noted.
(B) To point out a discrepancy in the mathematical equation that follows.
(C) To attribute an error to the source of the information and not herself.
(D) To alert readers that something paradoxical has been noted.
(E) To reveal the truth about an assertion.
2. According to the passage, temperatures in the 2700–3000 K range are likely to appear in which of the following colors?(A) Blue
(B) Green
(C) White
(D) Grey
(E) Yellow
3. Which of the following can we best infer about colloquial language used about color from the passage?(A) The colloquial language used about light is unrelated to actual observations about light.
(B) Colloquial language about light often reflects actual observation about the color of hot things.
(C) Colloquial language about the color of light is very poetic.
(D) Most people who use colloquial language do not understand the scientific heat-light-color relationship.
(E) The heat-light-color relationship is not expressible in colloquial language (in bold).
4. Which of the following statements most accurately captures the central idea of the passage?(A) There is a relationship between heat and color.
(B) Kelvin is a unit of measurement for heat.
(C) We have developed a great deal of colloquial language to express how hot something is.
(D) The relationship between heat, light, and color is sometimes counter-intuitive.
(E) Heat is very dangerous.
5. According to the passage, which is hotter?(A) Metal burning “red-hot.”
(B) Metal burning “white-hot.”
(C) Wood burning “blue-hot.”
(D) Brick burning “red-hot.”
(E) All things burning hot are equally dangerous.