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Conservation of Mass

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  • Is the following an example of a physical change or chemical change? Milk going sour
    Chemical change
  • The amount of matter in an object is defined as:
    Mass
  • Is the following an example of a physical change or chemical change? Digesting food
    Chemical change
  • What is a chemical change?
    When a chemical reaction takes place and at least one new product is made. This type of change is usually irreversible.
  • The substances undergoing a change.
    Reactants
  • Is the following an example of a physical change or chemical change? Burning a log.
    Chemical change
  • The law of conservation of mass states that mass cannot be ________ or ________.
    lost or made/created or destroyed
  • True or False: The mass of an object changes when it goes through a physical or chemical change.
    False
  • The substances resulting from the reaction.
    Products
  • Is the following an example of a physical change or chemical change? Melting ice cubes -
    Physical change
  • Provide an example of a chemical change.
    Fireworks exploding, burning wood, digesting food, etc.
  • Adam has a bowl of skittles that has a mass of 200g. He separates the skittles by color, and weighs them all together. What is the total mass of the ingredients?
    200g
  • What is not an example of matter?
    Light, energy, sound
  • Define the Law of Conservation of Mass.
    No matter what kind of change takes place, the total mass is conserved. The total mass of the products will always equal the total mass of the reactants.
  • Is the following an example of a physical change or chemical change? Cutting your hair.
    Physical change
  • Provide an example of a physical change.
    Glass breaking, water evaporating, mixing candy pieces
  • What does 'conserved' mean?
    To protect/save
  • Define matter.
    Anything that has mass and takes up space.
  • What are the three forms of matter?
    Solid, Liquid, Gas
  • Is the following an example of a physical change or chemical change? Mixing sand and water.
    Physical change
  • What is a physical change?
    A change in the physical properties of a substance. This type of change is reversible.
  • True or False: A mixture of cake batter has a mass of 850g. Once it is cooked, the mass will remain the same.
    True
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