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Physical & Chemical Changes quiz

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Terms in this set (19)

  • What is an example of qualitative data in observations?
    The solution is blue.
  • When does transformation occur in a chemical reaction?
    Transformation occurs when new chemical bonds are formed, resulting in new substances with different identities.
  • What happens when you stir a spoonful of sugar into hot water?
    The sugar dissolves in the hot water, which is a physical change as the composition of sugar remains unchanged.
  • Which of these is an example of qualitative data? A) The liquid is clear. B) The density is 1.2 g/mL. C) The length is 10 cm. D) The pressure is 2 atm.
    A) The liquid is clear.
  • What is an example of a qualitative observation?
    The substance is red.
  • Which term is used to refer to an observable trait?
    The term 'phenotype' is used to refer to an observable trait.
  • What is an example of an observation rather than an inference?
    The liquid is boiling.
  • What is an example of a qualitative observation?
    The solution is acidic.
  • What happens when salt is placed in water?
    Salt dissolves in water, which is a physical change as the chemical composition of salt remains unchanged.
  • Which of these scenarios is most likely a chemical reaction? A) Ice melting. B) Sugar dissolving in water. C) Iron rusting. D) Water boiling.
    C) Iron rusting.
  • Which is an example of objective information? A) The sky is beautiful. B) The temperature is 20°C. C) The music is loud. D) The cake is delicious.
    B) The temperature is 20°C.
  • What type of change is digestion of food?
    Digestion of food is a chemical change.
  • Which of these recorded observations is qualitative? A) The mass is 10 grams. B) The liquid is transparent. C) The length is 5 meters. D) The temperature is 25°C.
    B) The liquid is transparent.
  • What is an example of a change in technology?
    A) A new smartphone model.
  • What is the difference between evaporation and transpiration?
    Evaporation is the process of liquid turning into vapor, while transpiration is the release of water vapor from plants.
  • During which event does a chemical change occur?
    C) Wood burning.
  • What happens when sugar dissolves in water?
    Sugar dissolves in water, resulting in a physical change as the sugar's chemical composition remains unchanged.
  • Which change in the physical state of water requires the input of energy?
    C) Melting.
  • What is an example that is not erosion?
    D) A tree growing roots into the soil.