Do Now: 3/2 unit 4 test review

Like Copernicus, Kepler proposed a geocentric model, but Kepler also proposed circular orbits.

Like Copernicus, Kepler proposed a geocentric model, but Kepler also proposed elliptical orbits.

Like Copernicus, Kepler proposed a heliocentric model, but Kepler also proposed circular orbits.

Like Copernicus, Kepler proposed a heliocentric model, but Kepler also proposed elliptical orbits.

NASA scientists send satellites to collect images of Earth's surface from space.

NASA scientists debate the possibility of the future reversal of the universe's motion.

NASA scientists review the criteria for classifying an object in the universe as a planet.

NASA scientists study background radiation and determine the changing shape of the universe.

Option 1

Option 2

Option 3

Option 4

visible radiation with a frequency that is lower than that of red light

visible radiation with a frequency that is higher than that of red light

invisible radiation with a frequency that is lower than that of red light

invisible radiation with a frequency that is higher than that of red light