Science Review Crossword (4-7)

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Across
  1. 5. a group of stars that when seen make a shape or picture
  2. 8. to put into groups
  3. 10. a change that happens because of some kind of action
  4. 12. a flammable gas
  5. 15. natural substances made up of one or more minerals
  6. 17. the presence of substances in the environment that are harmful to humans or other organisms
  7. 20. the change from water vapor to liquid water
  8. 22. connected
  9. 24. naturally occurring nonliving solids in Earth's crust
  10. 27. the amount of salt dissolved in water
  11. 29. the energy that comes from the movement of water
  12. 31. an imaginary line that goes through the center of an object
  13. 32. a huge ball of very hot matter that gives off energy
  14. 34. underground water supplies
  15. 35. something found in nature that humans use
  16. 36. water that falls as rain/snow/sleet/hail
  17. 37. a satellite made of rock and ice that orbits a planet
  18. 39. a resource that is not made fast enough to replace what is used
Down
  1. 1. a dark area or shape that is made when an object blocks a source of light
  2. 2. the continuous movement of water on Earth
  3. 3. the practice of protecting the environment and using resources carefully
  4. 4. the four planets that are farther from the sun (Jupiter, Saturn, Uranus, Neptune)
  5. 6. we get as much as we can and do not waste
  6. 7. the planets closest to the sun Mercury, Venus, Earth, and Mars
  7. 9. the way something looks
  8. 11. places to collect and store water
  9. 13. the movement of one object around another object
  10. 14. a slowly moving body of ice on land
  11. 16. spread out
  12. 18. a system of eight planets and the sun, along with moons, asteroids, and comets
  13. 19. a swirling motion
  14. 21. the curved path of an object around a star, planet, or moon
  15. 23. a group of objects or events that repeat in the same order
  16. 25. the spinning of Earth and other bodies in space on an axis
  17. 26. a material that is made by nature at least as quickly as people use it
  18. 28. a force of attraction between two objects
  19. 30. the process of changing liquid water into water vapor
  20. 33. chunks of rock that measure in size from a meter to several kilometers in diameter
  21. 38. chunks of ice and dust or rock that have stretched out orbits around the sun