Earth and Space Mock Test Vocabulary

This set of vocabulary flashcards covers key concepts from the Earth and Space mock test, including axial tilt, moon phases, and eclipse mechanics.

Earth's Axial Tilt

The angle of Earth's axis, which is about $23.5^{\circ}$, causing seasonal changes in sunlight, daylight hours, and temperature.

Solar Eclipse Alignment

$\text{Sun} \rightarrow \text{Moon} \rightarrow \text{Earth}$.

Lunar Eclipse Alignment

$\text{Sun} \rightarrow \text{Earth} \rightarrow \text{Moon}$.

Equinox

An event when most places on Earth experience nearly equal lengths of day and night.

Earth's Revolution

The movement of Earth around the Sun, taking about $365 \text{ days}$, which determines the length of seasons.

Earth's Rotation

The spinning of Earth that determines the length of day and night and causes the Sun to rise in the east each day.

Waxing Crescent

A Moon phase where the illuminated portion is increasing, occurring before the first-quarter phase.

First-quarter Phase

A Moon phase occurring about one week after a waxing crescent where about half of the visible surface is illuminated.

Full Moon

The Moon phase required for a lunar eclipse to occur, reached about two weeks after a waxing crescent.

New Moon

The Moon phase required for a solar eclipse to occur.

Lunar Eclipse Coloration

The phenomenon where the Moon appears red because Earth's atmosphere scatters blue light and bends red light toward the Moon's surface.

Solar Eclipse Visibility

Visible only from a narrow path on Earth because the Moon's shadow on Earth is relatively small.

Lunar Eclipse Visibility

Visible from the entire nighttime side of Earth because Earth's shadow on the Moon is much larger than the Moon's shadow on Earth.

Northern Hemisphere Summer

Occurs when the Northern Hemisphere is tilted toward the Sun, receiving more direct sunlight and longer daylight hours.

Northern Hemisphere Winter

Occurs when the Northern Hemisphere is tilted away from the Sun, resulting in lower-angle sunlight and shorter daylight hours, despite Earth being closest to the Sun in early January.

Moon's Orbital Tilt

The reason eclipses do not occur every month, as the Moon's orbit is tilted relative to Earth's orbit, preventing perfect alignment.

Hypothetical Upright Earth

A scenario where Earth has no axial tilt, leading to the disappearance of seasons and consistent temperature patterns year-round.