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Earth's Motion
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Name an object that is a sphere
A globe, a beach ball, an orange
Heliocentrism is ____
Copernicus' theory that the Sun is at the center of the solar system
A sphere is _____
a round, three-dimensional object like a beach ball
One half of the Earth is called a ______
hemisphere
An imaginary line that runs through the center of the Earth from the geographic North pole to the geographic South Pole is called ___
axis
Another word for revolve is _______
orbit
To go around or orbit something is called ______
revolution
To spin on an axis is called __________
rotation
The Earth's axis is always pointed in which direction? (N, S, E or W)
to the North (the North Star -- Polaris)
What holds the Earth and the other planets in their orbits?
the Sun's gravity
How long does it take the Earth to make one complete revolution around the Sun?
365 days
Earth's axis is tilted _______ degrees in relation to the Sun.
23.5
When the Eastern hemisphere is facing the sun, the Western hemisphere is experiencing ______
nightime
How long does it take Earth to complete one full spin or rotation?
24 hours
In what direction does the Earth rotate?
counterclockwise (left to right)
What is an axis?
An imaginary line that runs through the center of the Earth from the North Pole to the South Pole
Is a ballet dancer pirouetting (turning on pointed toe) an example of rotate or revolve?
rotate
Is a horse on a merry-go-round an example of rotate or revolve?
revolve
Is a tetherball going around a pole an example of rotate or revolve?
revolve
Is a spinning top an example of rotate or revolve?
rotate
"Revolve" means __________
to go around or orbit something
"Rotate" means ____________
to spin on an axis
What is a round, three-dimensional object, like a beach ball called?
a sphere
What do we call the theory of astronomer Copernicus that stated that the Sun is at the center of the solar system?
heliocentrism