Unit 4 Lesson 1&2 Vocabulary

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1.
1 point
Astronomer who believed in the geocentric model, but added the wheels on wheels theory of orbits.
2.
1 point
Is the path that an object follows around another object.
3.
1 point
Is the force of attraction between objects.
4.
1 point
Astronomer who was under house arrest for promoting the heliocentric view of the universe which was against the church.
5.
1 point
______________ were formed by dust grains which collided to form planets.
6.
1 point
The astronomer who stated planets traveled in ellipses.
7.
1 point
Is a model that used the Earth as the center.
8.
1 point
Earth and the other planets orbit the Sun.
9.
1 point
Is the cloud which formed the solar system.
10.
1 point
_____________ is a point where the object is farthest from the sun.
11.
1 point
Is a force that causes an object to move in a circular path.
12.
1 point
The Greek astronomer who believed the Earth was the center of the universe.
13.
1 point
Is the Sun and all of the bodies that orbit the sun.
14.
1 point
Is where the object is closest to the sun.
15.
1 point
______________ is the change in position of object based on location.