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G4 Science Final Term Review

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  • Is tearing paper a physical or chemical change?
    A physical change.
  • When liquid water boils, it becomes...
    water vapour.
  • If a key rusts, can it change back to being non-rusty?
    No. It's a chemical change. It's irreversible.
  • What happens when ice gets too hot?
    It melts into liquid water.
  • Can a rotting apple reverse back to a good apple?
    No, this is a chemical change. Its irreversible.
  • What are the 3 states of matter?
    Solids, liquids, gases
  • Is burning wood a physical or chemical change?
    A chemical change.
  • Define chemical change.
    A chemical change is a change of materials into another, new materials with different properties and one or more than one new substances are formed.
  • Give an example of a physical change.
    Folding, tearing or bending paper, molding clay or dough....
  • What is a liquid?
    A state of matter that does not have its own shape and takes the shape of its container.
  • Give an example of a chemical change.
    Cooking meat, a car rusting, burning wood, eating chicken...
  • What is a mixture?
    Something made up of two or more kinds of matter.
  • What is a solid?
    A state of matter that keeps its own shape and size.
  • Is boiling water a physical or chemical change?
    A physical change.
  • Is baking bread a physical or chemical change?
    A chemical change.
  • Is molding clay a physical or chemical change?
    Physical change.
  • Define physical change.
    A change to matter that does not make it a new kind matter (page 119).
  • True or false? When vapor cools down into water, the water has the same mass as the vapor.
    True!
  • What is a gas?
    A state of matter that does not have its own shape or size and fills its container completely.
  • Name 3 solids you can see in the classroom.
    Desk, window, table, floor, books...
  • How do we separate a mixture of sugar and water?
    We boil the liquid and let the water evaporate.
  • What is matter?
    Everything around us - solids, liquids, gases.
  • Can the volume of a Pepsi change if you pour it into a different glass?
    No, the volume stays the same.
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