7th Grade Unit 3 Vocab

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Across
  1. 1. The oxygen you breathe is made of only one type of atom
  2. 5. Two hydrogen atoms and one oxygen atom making water
  3. 6. Helium filling balloons without reacting with anything
  4. 12. A metal spoon getting hot after sitting in a pot of soup
  5. 13. Why a rock sinks in water but a piece of wood floats
  6. 19. Ice cubes melting into water in your glass
  7. 22. Salt is made from sodium and chlorine combined
  8. 23. The particles moving through wires when you turn on a lamp
  9. 24. Iron used to build bridges because it’s strong and conducts heat
  10. 25. The tiny building blocks inside everything from your desk to your drink
  11. 28. Copper wires carrying electricity in your home
  12. 30. The brittle graphite in your pencil
  13. 31. Why a gold ring feels heavier than an aluminum ring of the same size
  14. 32. A wooden chair that keeps its shape
Down
  1. 2. Silicon chips inside your computer
  2. 3. A glass of distilled water with nothing else mixed in
  3. 4. Why a bowling ball is harder to lift than a soccer ball
  4. 7. The positive particle that makes hydrogen different from helium
  5. 8. Air pushing on the walls of a tire to keep it inflated
  6. 9. Heat from the sun warming the sidewalk
  7. 10. The force that keeps the atoms in sugar stuck together
  8. 11. Checking a thermometer to see if it’s hot enough to bake cookies
  9. 14. The chart scientists use to organize all the elements
  10. 15. Air filling up a balloon and spreading out inside it
  11. 16. Butter turning soft and liquid on a warm day
  12. 17. The reason oxygen and carbon are different—it’s about their proton count
  13. 18. Your backpack, your book, and even the air—they all take up space
  14. 20. The neutral particle sitting inside the nucleus of an atom
  15. 21. When water in a kettle starts steaming on the stove
  16. 26. Ice, water, and steam are all the same substance in different states
  17. 27. Measuring how much space juice takes up in a measuring cup
  18. 29. Milk taking the shape of your glass