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4.1 DBA Review

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  • A chocolate candy bar is left on a car seat on a hot summer day. What will happen to the chocolate bar?
    The chocolate bar will soften
  • A teacher wants to demonstrate that some substances keep their shape and color when they are mixed. What substances should the teacher use: sugar and water, sugar and milk, salt and water, salt and sand
    Salt and sand
  • True or False: Items that are less dense than water SINK.
    False
  • Based on the information in one of the student’s charts, which fruit does not belong in the same group as the other fruits?
    orange
  • Which mixture is most similar to a mixture of pebbles and marbles? Marshmallows and hot chocolate, uncooked rice and pennies, air and smoke, or sand and oil?
    uncooked rice and pennies
  • What will happen to an ice cube that is left on a hot sidewalk?
    he ice cube will first melt into a liquid and then evaporate into the air as a gas.
  • A student makes sugar water to put in a hummingbird feeder. She stirs sugar into water until the sugar dissolves. The sugar water is an example of -
    a solution and a mixture
  • A student breaks eggs into a pan and scrambles the egg yolks and egg whites together to make scrambled eggs. How will the state of the scrambled eggs change when heat is added to them?
    The eggs will change from a liquid state to a solid state.
  • Using the terms "less dense than" or "more dense than", how would you describe the density of vegetable oil in a jar with water?
    The vegetable oil is less dense than water because it is floating on the top
  • Which substance forms a solution when mixed with water: salt, oil, sand or rocks?
    salt