Physical and Chemical Properties Review

1234567891011121314151617181920212223242526
Across
  1. 3. In a chemical reaction, the ___ of the reactants always equals the products because we start and end with the same number of atoms
  2. 5. An example of a chemical change is a change in ____ like the outside of a piece of bread that has been toasted or the pancakes we made.
  3. 7. Anything that is made up of one kind of molecule or atom is called a ___ substance.
  4. 10. When a solid object is heated to a temperature that turns it into a liquid
  5. 11. State of matter where molecules are moving the fastest and have no definite shape
  6. 14. When we made Elephant toothpaste, the _____ increased, which is a sign of a chemical change.
  7. 16. The physical property seen when one substance dissolves in another.
  8. 17. Molecules formed after a chemical reaction has happened (on the right side of the chemical equation)
  9. 18. A physical change of an object could be cutting it into smaller pieces to change its ___
  10. 20. Property that helps identify pure substances by the formula mass/volume.
  11. 23. In a chemical formula, this represents a chemical reaction is taking place
  12. 25. When liquid matter is cooled down to the point where it turns to a solid
  13. 26. The word for the point at which liquid turns into a gas
Down
  1. 1. When we mixed baking soda and vinegar, we saw signs of a chemical reaction because when the reactants mixed they made ___.
  2. 2. When we explored marshmallow molecules, we learned that we need oxygen as a reactant to cause something to burn. Burning something shows us the chemical property _____.
  3. 4. The number 2 in front of the formula for water in the equation “2H2 + O2 —> 2 H2O” means there are 2 ___.
  4. 6. An example of a ____ property is acidity or reactivity of a compound
  5. 8. Anything that is a combination of atoms and molecules in a container is called a ___.
  6. 9. In a gas, atoms and molecules are moving at a ____ speed.
  7. 12. State of matter where molecules are moving around and take the shape of their container
  8. 13. “Ingredients” in a chemical reaction
  9. 15. An example of a physical change is a change in ____ like heating water from an ice cube and turning it into water and then water vapor.
  10. 19. The law of conservation of mass states that in a chemical reaction matter is not created or destroyed, but _____ into new substances
  11. 21. In a solid, atoms and molecules are moving at a ___ speed.
  12. 22. An example of a _____ property is the color, density, or size of an object
  13. 24. State of matter where molecules are moving very little and the matter has a definite shape