1.
eclipse occurs when the Moon moves directly between the Sun and Earth and casts a shadow on part of the Earth
2.
occurs twice yearly (March & September) when the sun is directly above the Earth's equator, and the number of daylight hours are equal to the number of nighttime hours, worldwide.
3.
occurs twice yearly (June & December) when the sun reaches its greatest distance north or south of the equator
4.
elongated, closed curve with two foci
5.
earth-centered model of the solar system
6.
sun-centered model of the solar system
7.
mass of dust, rock particles, frozen water, methane, and ammonia that travels through space and develops a bright, distictive tail of light as it approaches the Sun and is pushed on by the solar wind
8.
rocky solar system objects of widely varying size usually found between the orbits of Mars and Jupiter in an area called the asteroid belt
9.
other rocky solar system objects formed from pieces of comets and asteroids
10.
type of rotation based on the timing of Earths rotation & revolution the same side of the moon is always facing the Earth.
11.
Theory states that the Moon formed 4.6 billion years ago when a Mars-sized object collided with Earth. (two words)
12.
eclipse occurs when the Earth's shadow falls on the Moon
13.
the Earth's motion of orbit around the Sun
14.
the spinning action of the Earth, allows us to experience days
15.
__________ Universal Law of Gravitation There is a force of attraction between any two objects in the universe.
16.
Kelper's ______ Law of Planetary Motion States that all orbits are in the shape of an ellipse.
17.
Kepler's ____ Law of Planetary Motion States that planets sweep out equal amounts of area in equal amounts of time.
18.
Kepler's ________ Law of Planetary Motion States that there is a relationship between the orbital period of a planet and the distance that a planet travels in it's orbit.
19.
the point in a planet's orbit that is farthest from the sun
20.
point in a planet's orbit that is closest to the sun
