Which of the following best describes the shape of the Earth?
What will be an ideal response?
a geoid
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According to the parameters derived for the Drake Equation, where should astronomers look for life in the Milky Way?
A) around F, G, or M stars that are in multiple star systems located in the galactic habitable zone with a multiple planet system with jovian outer planets and at least one terrestrial planet within the star's habitable zone B) around O, B, or A stars that are in single star systems located in the galactic nucleus with a multiple planet system with jovian outer planets and at least one terrestrial planet within the star's habitable zone C) around F, G, or M stars that are in single star systems located in the galactic habitable zone with a multiple planet system with jovian outer planets and at least one terrestrial planet within the star's habitable zone D) around O, B, or A stars that are in single star systems located in the galactic habitable zone with a multiple planet system with jovian outer planets and at least one terrestrial planet within the star's habitable zone E) around F, G, or M stars that are in single star systems located in the galactic habitable zone with a multiple planet system with no outer planets and at least one terrestrial planet within the star's habitable zone
Which of the following is NOT true about the RGB color system?
A. The system combines the red, green, and blue light channels. B. The intensity level of each light channel is measured in values. C. The values range from 0 to 360. D. To ensure exact color specifications, use different values from the channels.
The typical size of the interstellar dust particles is ________ and they consist of ________.
A. about a micrometer or less; silicates and carbon compounds B. 1 cm; silicates and carbon compounds C. about a micrometer or less; hydrogen and helium D. 1 mm; hydrogen and helium
Which constellation lies in the direction toward the galactic center?
A) Orion B) the Big Dipper C) Leo D) Sagittarius E) Taurus