axis-real or imaginary line an object spins around
Earth completes 1 rotation every day (24 hrs)
During the day Earth faces the sun (where you live)
At night, where you live faces away from the sun
Apparent Motion-the way something appears to move, not how it actually happens (the sun appears to rise in the East and set in the West) this is not real motion
Stars do not move, planets and moons may appear to move differently than they actually are
Shadow is formed when light strikes an object but does not pass through
Shadows change with the position of the sun (shadows are shorter when the sun is high in the sky, longer when the sun is low in the sky)
Revolution-object travels around another
path a revolving object takes is an orbit
Earth's orbit is like an ellipse (flattened circle) takes 365 days (1yr) to complete
The tilt of the axis of Earth (23.5) does not change
hemisphere (hemi=half, sphere=ball)
Seasons come from the tilt of the axis and revolution around the sun
If sunlight hits a part of the earth more directly than other parts, it is summer
If sunlight does not hit the earth directly, it is winter
At the equator, the suns path in the sky, and temperatures change little
At the poles, the sun's path changes greatly, as do the temperatures
The sun changes apparent paths change in the same pattern every year, which helps scientists make predictions about the rising and setting times of the sun
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