Final Exam Review

Front

What causes retrograde motion in planets?

Back

Retrograde motion is primarily caused by Earth’s faster orbit overtaking the planet.

Front

What was a major weakness of the original Copernican model?

Back

The original Copernican model described planetary orbits as perfect circles.

Front

During which Moon phase is the left half illuminated as seen from Earth?

Back

The left half of the Moon is illuminated during the 3rd quarter phase.

Front

Which type of radiation has the shortest wavelength?

Back

Gamma radiation has the shortest wavelength.

Front

What is the primary claim of the Copernican model of the solar system?

Back

The primary claim of the Copernican model is that the Sun is at the center of the solar system.

Front

Define retrograde motion.

Back

Retrograde motion is the apparent backward movement of a planet as observed from Earth.

Front

What is the significance of the 3rd quarter Moon phase?

Back

In the 3rd quarter phase, half of the Moon is illuminated, and it is often associated with the waning of the lunar cycle.

Front

Explain the concept of planetary orbits in the Copernican model.

Back

The Copernican model proposed that planets orbit the Sun in circular paths, which was later corrected to elliptical orbits by Kepler.

Front

What is the difference between gamma rays and x-rays?

Back

Gamma rays have shorter wavelengths and higher energy than x-rays.

Front

What is the heliocentric model?

Back

The heliocentric model is the astronomical model in which the Earth and planets revolve around the Sun.