PHYSICAL AND CHEMICAL CHANGES

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Across
  1. 7. Over 110 of these are listed on the periodic table.
  2. 9. Which science is obviously the best?
  3. 12. A form of energy associated with the movement of atoms and molecules in any material
  4. 13. Characteristic that can be observed or measured without changing the compostition
  5. 16. Bend over on itself so that one part of it covers another
  6. 17. The most important sign of chemical change.
  7. 19. Separate or cause to separate into pieces as a result of a blow, shock or strain
  8. 21. On Monday, lead nitrate and potassium iodide mixed together to form a yellow p..........
  9. 22. A distinctive smell, especially an unpleasant one
  10. 25. A colorless, odoUrless, gas produced by burning carbon and organic compounds and by respiration.
  11. 26. Magnesium and hydrochloric acid reacted together to create this type of gas. When ignited, it makes a loud POP!
  12. 27. To make a solution of, as by mixing with liquid.
Down
  1. 1. Any change that results in the formation of new chemical substances
  2. 2. To pull apart so as to leave ragged or irregular edges
  3. 3. A physical change may include a change in s....o.m..... An example of this is ice melting to water.
  4. 4. Burning magnesium, reacting sodium with water, and glow sticks all create the same type of evidence of chemical reaction. It is ......
  5. 5. True or false, the holes or 'bubbles' in bread are evidence of a physical reaction?
  6. 6. Crushing a solid is a form of this type of change.
  7. 8. A SUBSTANCE that is composed of two or more DIFFERENT TYPES OF ATOMS
  8. 10. To pass from the liquid to the solid state by loss of heat
  9. 11. Characteristic that can be observed or measured without changing the compostition
  10. 14. Combustion is a type of chemical change. It is often referred to as b......
  11. 15. Vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear
  12. 18. A rising temperature
  13. 19. The action of bringing a liquid to the temperature at which it bubbles and turns to vapor
  14. 20. A falling temperature
  15. 23. Chemical reactions may become exothermic. This is a type of energy created.
  16. 24. When gas is formed in a reaction, it is often seen by this.