Final answer:
After the waning gibbous phase, each night the Moon will appear slightly smaller as its illuminated portion decreases, heading towards the new moon.
Step-by-step explanation:
After the waning gibbous phase of the lunar cycle, the Moon goes through the reverse of the phases it previously underwent, heading towards the new moon.
As the Moon moves each night in its orbit around Earth, the illuminated part that we can see from Earth decreases slightly each day.
This means that after the waning gibbous phase, a person on Earth's surface should expect to see the Moon getting a bit smaller (less illuminated) each night, as it progresses towards the third quarter phase and eventually to a waning crescent, culminating in the new moon phase after about two weeks.