Lesson 10 Phases of the Moon

Flashcards about the phases of the moon and tides.

Near Side

The side of the moon that always faces the Earth.

Far Side

The side of the moon that always faces away from the Earth.

Moon's Rotation and Revolution

The moon rotates and revolves approximately every 29.5 days.

Phases of the Moon

The different shapes of the moon visible from Earth, caused by the moon's revolution around Earth.

Waxing

Increasing in illumination; getting brighter.

Waning

Decreasing in illumination; getting dimmer.

Tides

The rise and fall of ocean water that occurs approximately every 12.5 hours.

High Tide

Occurs when the moon is parallel to the Earth (0° and 180°).

Low Tide

Occurs when the moon is perpendicular to the Earth (90°).

Spring Tide

A tide with the greatest difference between consecutive low and high tides.

Neap Tide

A tide with the least difference between consecutive low and high tides.