Physical Science

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Physical Science
2010-11-18 10:41:22
Test Review

CST Release Questions
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  1. At which locations is the magnetic field strongest on a magnet?
    at its poles
  2. What would you make if you wrapped a wire around a nail and attached it to a battery?
    an electromagnet
  3. What happens when two objects both have the same charge?
    They push away from each other (repel)
  4. What happens when one object has a positive charge and the other object has a negative charge?
    They are attracted to each other.
  5. How can you describe a parallel circuit?
    Electricity can flow along more than one pathway.
  6. What property of salt makes it important for making ice cream?
    Salt lowers the freezing point of water.
  7. How could you separate salt from water quickly?
    Heat the water. (using a stove, hot plate, fire, etc.)
  8. What instrument would scientists need to use to take a picture of atoms?
    An electron microscope
  9. If you see a picture of atoms all lined up neatly in rows, what state of matter are you most likely observing?
    A solid
  10. Why does a metal spoon left in a pot of boiling soup get hot?
    The metal spoon conducted heat energy.
  11. How can you tell if a substance is a combination of two or more elements?
    If it is not listed on the Periodic Table of Elements, it is made up of two or more elements.
  12. What does everything in the world have in common?
    Everything is made up of atoms
  13. What action will result in a product with new chemical properties?
    • A chemical change
    • (Signs of a chemical change are bubbles, color, light, or heat)
  14. What element do all living things contain?