This is the exact length of one period of rotation.
What is 24 hours.
100
These days cause equal day and night on Earth.
What is an equinox?
100
This is the reason we see the same side of the Moon everyday and night.
What is the moons rotation and revolution are equal?
100
The phase when a lunar eclipse occurs.
What is a full moon?
200
The spinning of an object on its axis.
What is rotation?
200
This is the exact length of one period of revolution.
What is 365.25 days?
200
This day has the longest day of the Earth year.
What is the summer solstice?
200
These are the reasons for the phases of the moon.
What are the moon's revolution and the Sun's reflection off the moon.
200
The part of the shadow where you will experience a full eclipse.
What is the umbra?
300
The orbiting of an object around another object.
What is revolution?
300
This is the way we fix Earth's calendar to match with our calendar.
What is we add one extra day every four years.
300
This day has the least amount of the Sun's energy reaching Earth.
What is winter solstice?
300
This the time it takes for the Moon to complete one set of moon phases.
What is 29.5 days?
300
The two types of high tides.
What are spring and neap tides?
400
This causes day and night on Earth.
What is rotation?
400
This caused the shape of the Earth to form.
What is gravity?
400
This day the Earth is at its highest point in the afternoon sky.
What is the summer solstice?
400
This is the difference between waxing and waning that is changing each night.
What is waxing the reflected area is increasing and waning the reflected area is decreasing each night?
400
This causes the Earth's tides.
What is the moon's gravity?
500
This causes the seasons on Earth.
What are Earth's tilt and its revolution?
500
These effects are observed on Earth due to its tilt and its revolution.
What are longer or shorter days during different parts of the year AND different angles of the suns rays on different parts of the Earth throughout the year.
500
This day the sun is midway between being it highest point in the sky and its lowest point in the afternoon sky.
What is an equinox?
500
This is happening between full moon and new moon.
When is the moon is waning?
500
The moon phases where the Earth experiences neap tides.