One full day-night cycle lasts 24 hours on Earth. It takes 24 hours for the Earth to make one full rotation around its axis
(rotates) Earth rotates or turns around its axis. One complete rotation takes 24 hours.
(revolves) describes the movement of a planet around the Sun.
an area of the world where all clocks are set to the same time. The Earth is divided into 24 major time zones because it takes the Earth 24 hours to complete one rotation around its axis. Chicago is in the Central Time Zone.
The path a planet follows around the Sun. The Earth's orbit is an ellipse (not fully circular).
365.25 days long; the time it takes the Earth to orbit the Sun.
23.5° degree tilt. If the Earth were tilted more, the weather would be more extreme/severe.
the Sun's direct rays causes the Earth to heat up (faster than indirect) for a warmer (summer) season
the Sun's indirect rays does not heat up the Earth as much as direct sunlight, leading to a cooler/colder (winter) season
The northern half (top half) of the Earth above the equator. If the season is summer in the Northern Hemisphere, it is winter in the Southern Hemisphere.
The southern half (bottom half) of the Earth below the equator. If the season is summer in the Southern Hemisphere, it is winter in the Northern Hemisphere.
When the moon is dark and not visible. When the lit side of the Moon is facing the Sun and the dark side is facing the Earth. Order: Sun, Moon, Earth.
When the Moon looks like a completely lighted circle. When the lit side of the Moon is facing the Earth. Order: Sun, Earth, Moon.
When the Moon half lit and half dark.
The different shapes of the Moon visible from the Earth.
The regular rise and fall of the ocean's surface influenced by the Moon's gravity pulling on Earth.
Takes about one month to complete one cycle (new Moon to new Moon).
The imaginary line that passes through Earth's center and the north and south poles, which Earth rotates around.
When the shape of the Moon is less than half.
When the shape of the Moon is more than half.
Calendars have been closely linked to the changing light from the Sun.