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Law of Conservation of Mass

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  • What does conserve mean?
    Saved, kept the same.
  • What is matter?
    Anything that has weight and takes up space.
  • Can matter vanish?
    No
  • Phase change of water occurs when
    Heat energy is added or removed.
  • Why do some reactions have different weights at the beginning and the end?
    Some atoms can escape if the reaction is not a closed system.
  • The law of conservation of mass quiz
    atoms are neither created or destroyed during a reaction
  • If a pot is left on the stove with water to boil, some of the water disappears. Where did the water go?
    When water is heated it changes form from liquid to gas. The gas then escapes into the air.
  • What are the 3 phases?
    Solid, liquid,gas
  • When two different substances are mixed:
    Their weight combined
  • The newly formed substances at the end of a reaction are called:
    Products
  • What is a gram?
    A scientific unit of measuring how heavy something is. A US dollar bill weights about 1 gram.
  • What does dissolve mean?
    To mix in with another substance. For example: when salt is added to water, it forms saltwater.
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