Physics

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Across
  1. 5. Regions where the field lines are parallel and evenly spaced, indicating the field strength and direction are constant at all points within that region (though this is an idealization, as gravity fields are typically radial).
  2. 6. An event where Earth passes between the Sun and the Moon, casting a shadow on the Moon.
  3. 7. An event where the Moon passes between the Sun and Earth, blocking all or part of the Sun's light.
  4. 8. The time it takes the Moon to complete one orbit around Earth with respect to the fixed stars, approximately 27.3 days.
  5. 10. An Earth-centered orbit with an orbital period matching Earth's rotation on its axis (one sidereal day).
  6. 11. A closed, oval-shaped curve, which is the shape of planetary orbits according to Kepler's first law.
  7. 12. A phenomenon where two orbiting bodies exert a regular, periodic gravitational influence on each other, usually because their orbital periods are related by a simple integer ratio.
  8. 15. A type of eclipse where the celestial body is completely obscured.
  9. 16. A vector field used to explain the influence a body extends into the space around itself, measured in units of newtons per kilogram (N/kg) or m/s².
  10. 17. The time period of the Moon's phases, from new moon to new moon, averaging about 29.5 days.
  11. 18. A physical quantity that has a value (magnitude and direction) for each point in space and time, used to explain influences like gravity.
  12. 19. Law of Universal Gravitation: A law stating that every object attracts every other object with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.
Down
  1. 1. A scientific law stating that the intensity of a physical quantity is inversely proportional to the square of the distance from its source.
  2. 2. A type of eclipse where only part of the celestial body is obscured.
  3. 3. An imaginary curve used as a visual aid to represent a vector field, tangent to the field vector at each point along its length.
  4. 4. A solar eclipse in which the Moon is too far from Earth to completely cover the Sun, resulting in a "ring of fire" effect.
  5. 9. The universal empirical physical constant, denoted by the capital letter G, that determines the strength of the gravitational field.
  6. 10. The force of attraction between any two masses in the universe.
  7. 13. The curved path of a celestial object (such as a planet or satellite) around a star, planet, or moon.
  8. 14. A measure of how much an ellipse deviates from a perfect circle; a value of 0 is a circle.