Current Science Topics Review

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Across
  1. 3. Tendency of water molecules to stick together due to the force of attraction between them
  2. 5. Substance(s) before a chemical reaction in a chemical equation
  3. 9. Small numbers written to the right and below the element symbol that tell you how many atoms
  4. 11. Used to determine which elements are given in a chemical equation
  5. 12. Have a pH greater than 7, a bitter taste, and are slippery to the touch
  6. 15. When combined to form a _____________, substances do not undergo a chemical change
  7. 16. Mixtures that have a uniform composition
  8. 19. Rate of change of velocity; increase or decrease in speed and change in direction
  9. 21. Water has a ________ surface tension due to the cohesive forces, allowing small objects to float
  10. 22. Scale used to measure the acidity or basicity of solutions
  11. 24. Another word for a homogeneous mixture
  12. 25. How many molecules are present in the formula 4Fe2O3?
  13. 26. Pure substance that contains only one type of atom; cannot be broken down chemically
  14. 27. The pH of a neutral substance
  15. 29. If the mass of an object does not change, but the force acting on it increases, what happens to the acceleration of the object?
  16. 30. Pick the compound out of the following list: table salt, soil, sodium, cement
  17. 32. Type of paper used to measure the pH of substances
  18. 34. Compound that is a colorless, odorless, and tasteless liquid at room temperature
Down
  1. 1. Pick the element out of the following list: glucose, coffee, aluminum, salad
  2. 2. Choose the acid in the following examples: ammonia, bleach, soda
  3. 4. A measure of how difficult it is to break the surface of a liquid
  4. 6. The total mass of all reactants must ________ the total mass of all the products after a reaction
  5. 7. Substance(s) after a chemical reaction in a chemical equation
  6. 8. A push or a pull on an object, measured in Newtons
  7. 10. In a heterogeneous mixture, parts of the mixture are easily distinguishable and can be __________
  8. 13. Ability of water molecules to stick to other surfaces or materials
  9. 14. Choose the base in the following examples: lemon juice, antacid, vinegar
  10. 17. Mixtures that do not have a uniform composition
  11. 18. Amount of matter in an object, measured in grams or kilograms
  12. 20. Composed of two or more elements chemically combined; represented by a chemical formula
  13. 23. Large numbers written to the left of a chemical formula that tell you how many molecules
  14. 28. These organisms use cohesion and adhesion to uptake water through their root systems
  15. 31. Have a pH less than 7 and a sour taste
  16. 33. Cohesion is responsible for the formation of water droplets in this shape