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Science Unit 4 Review

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  • Burn paper. Physical or chemical?
    Chemical
  • Can physical or chemical changes by reversed?
    Physical
  • What is a physical change?
    Composition of the matter doesn't change
  • What is solubility?
    Describes if a material can dissolve in water
  • What are the three physical properties of matter?
    Hard or soft, tough or fragile, plastic or elastic
  • Leave an iron nail in water. Physical or chemical?
    Chemical
  • Freeze water. Is this physical or chemical?
    Physical
  • What is a solvent?
    The substance that dissolves the solute
  • Salt is insoluble in water. True or False?
    False
  • Plastic materials are easy to bend. True or false?
    True
  • What are the four chemical changes?
    Rot, Rust, Burn, Ferment
  • What is evaporation used for?
    Used to separate a soluble soid from a homogenous solution
  • What are the three properties of matter?
    Physical properties, solubility, thermal conductivity
  • What is mass?
    The amount of matter
  • Is metal a thermal conductor or insulator?
    Conductor
  • What is volume?
    The amount of space that matter occupies
  • What is a solute?
    The substance that dissolves
  • How do we measure volume?
    Cubic centimetres
  • What is filtration used for?
    Used to separate an insoluble solid from a hetergenous mixture
  • What is distillation used for?
    Used to separate a liquid from a solution
  • Melt butter. Is this a physical or chemical change?
    Physical
  • Is salt soluble or insoluble?
    Soluble
  • How do we calculate density?
    Mass divided by volume
  • What are the two types of thermal conductivity?
    Thermal conductors and insulators
  • Roll plastacine. Physical or chemical?
    Physical
  • How do we measure mass?
    Grams and kilograms
  • Plastic and wood are thermal insulators. True or flase?
    True
  • Make yogurt. Physical or chemical?
    Chemical
  • What is density?
    The amount of mass that there is in the volume of an object
  • A thermal conductor never gets hot. True or false?
    False
  • Metal is hard and fragile. True or False?
    False
  • What is a homogenous mixture?
    We can't see the separate substances
  • What are the two ways matter can change?
    Physical and chemical changes
  • Whatre the three properties of matter?
    Volume, mass, density
  • What is a chemical change?
    The composition of matter changes
  • What is homogenous mixture where one substance disolves in another?
    Solution
  • What is a heterogenous mixture?
    We can see the separate substances
  • What are the two types of mixtures?
    Heterogenous and Homogenous
  • What re the four physical changes?
    Shape, Place, State, Temperature
  • What are three ways to separate mixtures?
    Filtration, evaporation, distillation
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