8th Grade STAAR practice

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Across
  1. 4. a tall eighth grade boy
  2. 5. (2 words, no spaces) symbols that show the elements in a compound and the ratio of atoms
  3. 9. a type of bond formed when two atoms share electrons
  4. 12. the partial or total blocking of one object in space by another
  5. 14. (2 words, no spaces) a one-or-two letter representation of an element
  6. 16. either of the two days of the year on which neither hemisphere is tilted toward or away from the sun
  7. 18. (2 words, no spaces) force of attraction that holds two atoms together
  8. 19. the basic particle from which all elements are made
  9. 20. an eighth-grader who plays basketball
  10. 22. (2 words, no spaces) equal forces acting on an object in the opposite directions
  11. 24. the rate at which velocity changes
  12. 25. an eighth grade boy whose name starts with a g
  13. 26. (2 words, no spaces) an object whose gravity is so strong that nothing, not even light, can escape
  14. 27. (2 words, no spaces) the number of protons in the nucleus of an atom
Down
  1. 1. an eighth grade girl whose name has a y in it
  2. 2. a push or pull exerted on an object
  3. 3. Group 1 metals on the periodic table
  4. 6. (2 words, no spaces) the average mass of all isotopes of an element
  5. 7. a number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction
  6. 8. a tiny, negatively charged particle that moves around the outside of the nucleus of an atom
  7. 9. (2 words, no spaces) a change in which one or more substances combine or break apart to form new substances
  8. 10. the ability to do work
  9. 11. a nickname for an eighth grade girl that is part of her real name
  10. 13. a lens that is thicker in the center than at the edges
  11. 15. an eighth grader in the PAP class
  12. 17. (2 words, no spaces) a short, easy way to show a chemical reaction, using symbols
  13. 21. the brightness a star would have if it were at a standard distance from Earth
  14. 23. the brightness of a star as seen from Earth