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Item CL083001: At all times during a day there is only one point where sunlight is striking the surface of the earth at a 90° angle.

Which of the following statements is TRUE about sunlight striking the Earth at a 90° angle (perpendicular to the surface of the Earth)?

  1. At all times during a day there is only one point where sunlight is striking the surface of the earth at a 90° angle.
  2. At most times during a day there is only one point where sunlight is striking at a 90° angle, but at some times sunlight strikes many points at a 90° angle.
  3. At most times during a day sunlight strikes only one point on Earth at a 90° angle, but at some times sunlight does not strike anywhere at a 90° angle.
  4. Sunlight does not strike any point on the surface of the Earth at a 90° angle during a day.
Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 1094
6–8
n = 631
9–12
n = 459
Male
n = 489
Female
n = 577
English
n = 957
Other
n = 94
A. 30% 28% 32% 30% 29% 30% 30%
B. 29% 31% 27% 31% 28% 29% 32%
C. 26% 27% 25% 24% 28% 26% 23%
D. 15% 14% 16% 15% 15% 15% 15%