Earth, Moon, & Sun

Front

What causes the phases of the Moon?

Back

The phases of the Moon are caused by the changing positions of the Moon, Earth, and Sun, which affect how much of the Moon's surface is illuminated by the Sun as seen from Earth.

Front

What is a full moon?

Back

A full moon occurs when the Moon is on the opposite side of Earth from the Sun, allowing the entire face of the Moon to be illuminated.

Front

How long does it take for the Moon to complete one full cycle of phases?

Back

It takes about 29.5 days for the Moon to complete one full cycle of phases, known as a lunar month.

Front

What is the gravitational force?

Back

Gravitational force is the attraction between two objects with mass, which depends on their masses and the distance between them.

Front

How does distance affect gravitational force?

Back

Gravitational force decreases as the distance between two objects increases; the farther apart they are, the weaker the gravitational attraction.

Front

What is the relationship between mass and gravitational force?

Back

The gravitational force is stronger when the masses of the two objects are greater; more massive objects exert a stronger gravitational pull.

Front

What is the tilt of the Earth's axis and its effect on seasons?

Back

The Earth's axis is tilted at about 23.5 degrees, which causes different parts of the Earth to receive varying amounts of sunlight throughout the year, leading to the seasons.

Front

What is summer in the southern hemisphere?

Back

Summer in the southern hemisphere occurs when the southern hemisphere is tilted toward the Sun, resulting in longer days and warmer temperatures.

Front

What is the significance of the Moon's orbit around Earth?

Back

The Moon's orbit around Earth affects tides, the length of days, and the visibility of the Moon's phases.

Front

What is a new moon?

Back

A new moon occurs when the Moon is positioned between the Earth and the Sun, making it invisible from Earth.