Across
- 6. the fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse.
- 8. occurs when the moon gets between Earth and the sun, and the moon casts a shadow over Earth.
- 10. a kind of radiation including visible light, radio waves, gamma rays, and X-rays, in which electric and magnetic fields vary simultaneously.
- 11. seven days after a spring tide—refers to a period of moderate tides when the sun and moon are at right angles to each other.
- 12. the action or process of moving or being moved.
- 13. the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
- 16. an imaginary planetary line that is about 40,075 km long in circumference
- 17. are very long-period waves that move through the oceans in response to the forces exerted by the moon and sun.
- 22. a celestial body moving in an elliptical orbit around a star.
- 24. the act of rising to an important position or a higher level.
- 27. a fixed luminous point in the night sky which is a large, remote incandescent body like the sun.
- 28. have a progressively smaller part of its visible surface illuminated, so that it appears to decrease in size.
- 29. decides how much we weigh and how far a basketball will travel when thrown before it returns to the surface.
- 31. a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere.
- 33. a solid piece of debris from an object, that originates in outer space and survives its passage through the atmosphere to reach the surface of a planet or moon.
- 35. the angular distance of a place east or west of the meridian at Greenwich, England, or west of the standard meridian of a celestial object, usually expressed in degrees and minutes.
- 36. takes place when one heavenly body such as a moon or planet moves into the shadow of another heavenly body.
- 39. the angular distance of a place north or south of the earth's equator, or of a celestial object north or south of the celestial equator, usually expressed in degrees and minutes.
- 40. any time after new moon and before full moon, so called because its illuminated area is increasing.
- 42. he action by a celestial body of going round in an orbit
- 43. a period of the year that is distinguished by special climate conditions.
- 45. a celestial body that is in orbit around the Sun
Down
- 1. a tide just after a new or full moon, when there is the greatest difference between high and low water.
- 2. a large body of matter in orbit around the sun or a star and thought to be developing into a planet.
- 3. the point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun.
- 4. a single-stranded sequence of DNA or RNA used to search for its complementary sequence in a sample genome.
- 5. the angular distance of a point north or south of the celestial equator.
- 7. the mean distance from the center of the earth to the center of the sun.
- 9. he partially shaded outer region of the shadow cast by an opaque object.
- 14. the action of rotating around an axis or center.
- 15. the geocentric model is a superseded description of the Universe with Earth at the center.
- 18. relating to or belonging to a planet or planets.
- 19. a closed curve that never made it around to a circle
- 20. a small rocky or metallic body in outer space
- 21. the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun.
- 23. is an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process that is called outgassing.
- 25. the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
- 26. a natural phenomenon by which all things with mass or energy are brought toward one another.
- 30. the astronomical model in which the Earth and planets revolve around the Sun at the center of the Universe
- 32. an optical instrument using lenses to observe distant objects by their emission.
- 34. a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure.
- 37. the star around which the earth orbits.
- 38. a minor planet of the inner Solar System
- 41. the natural satellite of the earth, visible by reflected light from the sun.
- 44. the instant of time when the plane of Earth's equator passes through the geometric center of the Sun's disk.