Chemical Building Blocks

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Chemical Building Blocks
2012-02-21 10:02:25
chemical change physical matter mass

review for science test on Chemical Building Blocks
Show Answers:

  1. An example of a physical change is

    a baking a cake
    b heating sugar
    c dissolving salt in water
    dissolving salt in water
  2. An example of a chemical change is

    a boiling water
    b burning wood
    c crushing a can
    burning wood
  3. Sugar and salt are examples of

    a elements
    b pure substances
    c atoms
    pure substances
  4. Substances that CANNOT be broken down chemically into other substances are

    a elements
    b compounds
    c mixtures
  5. The measure of how much matter an object contains is its

    a volume
    b weight
    c mass
  6. The measurement of how much mass is contained in a given volume is called

    a weight
    b melting point
    c density
  7. All elements are composed of extremely small particles called

    a compounds
    b atoms
    c molecules
  8. Which is NOT an example of a chemical change?

    a rust forming on iron
    b salt dissolving in water
    c gas burning on a stove
    salt dissolving in water
  9. What holds atoms together in a molecule?

    a density
    b gravity
    c chemical bonds
    chemical bonds
  10. The volume of an irregular shaped object can be measured by

    a multiplying length by width by height
    b submerging the object in water in a graduated cylinder
    c placing the object on a triple-beam
    submerging the object in water in a graduated cylinder
  11. In the laboratory, volumes of liquid are usually measured with a(n)

    a scale
    b triple-beam balance
    c graduated cylinder
    graduated cylinder
  12. Anything that has mass and takes up space is called

    a matter
    b energy
    c heterogeneous
  13. How would you calculate the density of an object?

    a divide its weight by its volume
    b divide its mass by its volume
    c multiply its volume times its mass
    divide its mas by its volume
  14. The SI unit for mass is

    a ounce
    b kilogram
    c liter
  15. Lemonade consists of several substances that are NOT chemicall combined, so lemonade is classified as a(n)

    a compound
    b mixture
    c pure substance
  16. How do liquid water, ice and water vapor differ from each other?

    a they are different compounds
    b they are different states of matter
    c they are made of different kinds of atoms
    they are different states of matter
  17. If you heat a liquid and measure the temperature at which it boils, you are measuring a(n)

    a atomic property
    b physical property
    c molecular property
    physical property
  18. If you describe methane as a gas that easily catches fire, you are describing a

    a chemical property
    b state of matter
    c chemical formula
    chemical property
  19. Soil, a salad, and sugar water are all examples of

    a mixtures
    b elements
    c atoms
  20. During photosynthesis, plants transform electromagnetic energy from the sun into

    a electrical energy
    b kinetic energy
    c chemical energy
    chemical energy
  21. In which state of matter do the particles spread apart and fill all the space available?

    a gas
    b solid
    c liquid
  22. The change from liquid to solid, or the reverse of melting, is called

    a condensation
    b boiling
    c freezing
  23. The amount of space that gas takes up is its

    a volume
    b mass
    c density
  24. The tarnishing of metal is an example of

    a dirt
    b physical change
    c chemical change
    chemical change
  25. A ______ is formed when two or more substances are so evenly mixed that you can't see the different parts.

    a pure substance
    b solution
    c compound
  26. A ______ is a group of two or more atoms that are held together by chemical bonds.

    a molecule
    b atom
    c solution
  27. All matter has 2 kinds of properties: physical properties and _______ properties.

    a atomic
    b heterogeneous
    c chemical
  28. Hardness, texture, color, and freezing point are examples of ______ properties.

    chemical or physical
  29. Dissolving sugar in coffee is an example of a ______ change.

    chemical or physical
  30. The characteristic temperature at which a pure solid changes to a liquid is its ______ point.
  31. a glass breaks...chemical or physical change?
  32. paper burns...chemical or physical change?
  33. vinegar reacts with baking soda...chemical or physical change?
  34. water boils at 100 degrees...chemical or physical change?
  35. iron & sulfur are heated to form a non-magnetic shiny substance...chemical or physical change?