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Sunlight comes from the sun to the Earth. The sunlight that warms our faces right now left the sun over eight minutes ago. The sun warms the Earth .
What causes daytime and night time on the Earth? What causes the changing of our seasons?
The Earth whizzes along spinning in space at 67,000 miles an hour. We can’t feel it spinning. Yet is makes one complete turn every 24 hours.
This spinning around like a top is called rotation . As it spins only one side faces the sun. Day begins when our part of the world turns to face the sun.
Night falls when our part of the Earth turns away from the sun. The side facing away from the sun has nighttime.
This rotation or spinning of Earth causes day and night. The Earth rotates on its axis. The axis is an imaginary line through its center. It rotates once every 24 hours causing day and night . www.enchantedlearning.com/subjects/astronomy/activities/radiobuttonquiz/Earthpz.shtml
Every year the Earth travels around the sun. The Earth and the moon travel together in an orbit around the sun once a year.
One revolution around the sun equals 365 days . This revolution causes the changing of the seasons.
Where does the light shining from the moon come from?
Why does it seem to change shapes in space?
The moon circles around the Earth about once every 28 days . The moon does not spin like the Earth. The moon only spins once a month on its axis. The moon looks bright at night, but it does not make its own light.
These changes of how the moon looks from the Earth are called the moon’s phases. Sometimes the moon looks completely dark and seems to disappear. This is called a new moon. Sometimes the moon looks round. This is called a full moon.
It appears to grow larger until it is a round, full moon. Then the full moon appears to grow smaller. This is called the waning moon. When the moon goes from a new moon to a full moon, it has complete one orbit of cycle.