Gravity Crossword

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Across
  1. 6. One of the four fundamental physical forces. The unification of electric and magnetic forces.
  2. 12. One of the four fundamental physical forces. Binds quarks together in clusters to make more-familiar subatomic particles, such as protons and neutrons. It also holds together the atomic nucleus and underlies interactions between all particles containing quarks.
  3. 13. A fundamental law of physics that states that gravitational and inertial masses are of a similar nature, quantitatively identical, and apparently indistinguishable.
  4. 14. A group of ideas that explain a group of facts or phenomena, also called laws, in the natural world. These are repeatedly confirmed through experiment or observation.
  5. 16. Statements, based on repeated experiments or observations, that describe or predict a range of natural phenomena. These often, at least originally, lacked a theoretical explanation.
  6. 17. One of the four fundamental physical forces. Is only attractive, never repulsive. Arises between particles of matter.
  7. 18. These are everyday macroscopic manifestations of the electromagnetic force such as friction, the normal force, buoyancy, and tension.
Down
  1. 1. One of the four fundamental physical forces. Can be attractive or repulsive. Arises between electrically charged particles.
  2. 2. One of the four fundamental physical forces. Causes some forms of radioactivity, governs the decay of unstable subatomic particles, and initiates the nuclear fusion reaction that fuels the Sun.
  3. 3. The constant of proportionality in Newton’s law of universal gravity. Numerically equal to 6.67 x10-11 N2m2/kg2.
  4. 4. Einstein’s theory that describes gravity.
  5. 5. A region in space where each point is affected by a force. There are four fundamental field forces.
  6. 7. The rate of change of velocity per unit of time. Force divided by mass.
  7. 8. One of the four fundamental physical forces. Can be attractive or repulsive. Arises between electrically charged particles because of their motion.
  8. 9. A physical measurement of a substance that is measured in kilograms in the Metric System. There are two kinds of mass: Inertial Mass and Gravitational Mass.
  9. 10. A push or a pull. Measure in Newtons in the Metric System. There are fundamental field forces and everyday contact forces.
  10. 11. A physical measurement of a body as measured by its gravitational attraction for other bodies. Measured in kilograms in the Metric System.
  11. 15. A physical measurement of the resistance of a body to acceleration. Measured in kilograms in the Metric System.