Movement of one object around another.

365 and ¼ days

Movement on the object’s axis

24 hours

Earth revolves around the Sun and the Moon revolves around the Earth

Rotation on Earth’s Axis. The side facing the sun is day, the side facing away is night.

The Earth’s Axis is tilted 23.5°

Because of Earth's tilt on it’s axis. Tilted toward the sun= summer. Tilted away from the sun= winter. Neither=fall or spring

The Equator gets the most direct sunlight all year long

Vernal Equinox and Autumnal Equinox both have 12 hours of daylight and 12 hours of night. (equal day and night)

Summer. The summer solstice is the longest day of the year. It has more daylight than night.

Winter. The winter solstice is the shortest day of the year. It has less daylight hours and more night hours.

If the Earth was not tilted, we would not have seasons. It would be the same season all year long, because we would get the same amount of sunlight all year long.

Northern Hemisphere

Tilted toward= Summer

Tilted away= Winter

Equinox translates to “equal night” meaning there is 12 hours of daylight and 12 hours of night. Twice a year, Autumnal Equinox and Vernal Equinox

The winter solstice is the shortest day of the year. It has less daylight hours and more night hours.

The phase of the moon you see depends on how much of the sunlit side of the moon faces the Earth

We see different phases because the moon revolves around the Earth. As it revolves we see different parts of the sunlight side.

If you are looking at half of the moon in the sky you are seeing a “quarter moon”

From the new moon to the full moon, the phases get bigger a little at a time. (waxing means getting bigger)

Lunar eclipse can only happen during full moons, the Earth blocks the moon from the sun.

Solar Eclipse can only happen during New Moons. The moon blocks the sun from the Earth.

Because the Moon’s rotation and revolution takes about the same time (28 days). We only see one side of the moon.

It takes between 27-28 Earth days for the Moon to revolve around the Earth.

One week after a New Moon = 1st Quarter Two weeks after a New Moon = Full Moon Three weeks after a New Moon = 3rd

Quarter Four weeks after a New Moon= another

New Moon

Solar Eclipse

Lunar Eclipse

A ball spinning. A person spinning. Anything spinning. Rotation = spinning on Earth’s axis.