Here are the matches for the key ideas/scientists/terms of orbital motion with their correct descriptions:
- h. Geocentricism - Ptolemy, and others, idea that suggests the Earth is at the center of the universe and all other planets orbit it.
- o. Orbit - The Earth moves in a(n) _____ or path around the Sun.
- k. Orbital period - The moon takes 278 days to encircle the Earth. This amount of time is known as its _____.
- j. Gravity - What keeps our feet planted solidly on Planet Earth.
- e. Heliocentricism - Copernicus' model that the Sun is at the center of the Universe.
- i. Galileo - The scientist whose invention of the telescope helped to support Heliocentricism.
- n. Brahe - Kepler's boss and mentor who collected a large amount of astronomical data used by later astronomers.
- f. Newton - Scientist who coined the Universal Law of Gravitation.
- c. Kepler's 2nd Law - Another name for "The Law of Areas" where two parts of an orbit move in the same times and sweep out equal areas.
- l. Inertia - While the Earth is locked into orbit with the Sun's gravity, it continues moving forward due to _________.
- g. Kepler's 1st Law - The planets move in ellipses with the Sun at one of the Foci.
- d. Perihelion - Area of orbit closest to the Sun, and moves fastest, is called the _____.
- a. Aphelion - The area of orbit farthest from the Sun, and moves slowest, is called the ____.
- m. Kepler's 3rd Law - The Earth's distance from the Sun and orbital periods are proportional to that of Jupiter's, due to _____.
- b. Mass - According to Newton, Force increases when the ____ of an object increases.
These matches should help clarify the concepts associated with orbital motion.