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  1. ___________ force can be predicted by using an object's proportional mass and distance.
    Gravitational force
  2. The nemonic or memory device: My Very Educated Mother Just Served Us Nine Pizzas, is used to reference which nine objects?
    Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto
  3. Name the bright mass of incandescent gas that is a) composed largely of hydrogen and helium gasses, that b) contains a soupy, fourth state-of-matter: plasma, that c) is roughly one million times the size of the Earth, that d) its core, reaches temperatures of 27 million degrees Fahrenheit, and e) is located almost 93 million miles from the Earth.
    The Sun
  4. On clear nights in the Norther Hemisphere, Polaris the North Star is always visible above the horizon and points due _____.
  5. Without inertia, or an object's propensity to continue its current motion, the Earth wouldn't spin. If the effects of the Sun's _______ were to suddenly cease, the Earth would fly off into cold, dark space.
  6. From a great distance all planets appear spherical; however, these spheres differ greatly in ____, _____, and ___________.
    size, color and composition (or make-up)
  7. The ___ lies at the center of our (heliocentrical) solar system.
  8. The Red Planet
    Mars. Its surface contains iron oxide. The same coloring appears on weathered carpenter's nails or junked automobiles; often made from steel, an iron alloy. Mars is so close that it and its red color can be seen without a telescope.
  9. What theory is used to explain the motion of Earth? The force directly proportional to the product of two masses and inversely proportional to the square of the distance between the two masses.
  10. What collective term describes the Earth and nearby planets; the Moon and other satellite objects; the field of astroids between Mars and Jupiter; and the Sun?
    The Solar System
  11. What term is used to describe any one of the nine large objects in orbit around the Sun?
  12. The four closest planets to the Sun: Mercury, Venus, Earth and Mars are collectively referred to as the _____ planets. They'er mostly rocky and have one or fewer moons.
    The Inner Planets
  13. We call the tendency of an object in-motion to stay in-motion until acted upon by an equal or opposite force _______.
  14. What do we call a set of stars or star pattern that, when seen in the night sky, resembles a recognizable symbol or silhouette?
    A constellation
  15. What is the area of irregularly shaped bodies between Mars and Jupiter? This area defines the border between the inner and outer planets of our solar system.
    The Asteroid Belt
  16. What is the term use to describe a massive luminescent, or bright, sphere held together by its own gravity?
    A star
Card Set
Know the planets
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