Animation of lunar phases (in the northern hemisphere)
Animation of lunar phases (in the northern hemisphere)
Lunar Phases

TAKS Objective 5 - The student will demonstrate an understanding of earth and space systems

Moon Phase Misconception... "The most common incorrect reason given for the cause of the Moon's phases is that we are seeing the shadow of the Earth on the Moon! But this cannot be correct: when the Moon passes through the shadow of the Earth, we get a lunar eclipse. Anyone who has seen a lunar eclipse, though, might remember that the Moon actually passes through the Earth's shadow only rarely, so that can't be why the Moon has phases. The real reason for the Moon's phases depends on two things: the Moon is round, and the angle it makes with the Earth and Sun changes over its orbit."
- From Bad Astronomy
The simulation below is from McGraw Hill -