Discuss each question with your team. Be prepared to explain the reasoning behind your team's answers after the quiz.

  1. How did people know their location on Earth before GPS?
  2. The imaginary line in the sky called the celestial equator coincides with ________
    • the plane of the Earth's orbit
    • the plane of the Earth's equator
    • the ecliptic
    • the plane of the Solar System
    • the galactic plane
  3. The North pole of Earth's rotation axis currently points closest to the star ________
    • Spica 
    • Vega 
    • Zeta Reticuli 
    • Polaris 
    • Thuban
  4. Compared to an observer in Iowa, an observer in New Zealand would see an upside-down moon.
    • True
    • False 
A drawing of the Celestial Equator, shown as an orange circle surrounding the sky above the Earth.
Image credit: NASA