Matter DOL 4/8

A student compares the physical properties of the four objects shown: Rock, Rubber eraser, Paper cup, Wooden block. Which of these physical properties do all four objects have in common?

• They all have the same physical state and conduct electricity.

• They all conduct electricity and attract the same metal objects.

• They all attract the same metal objects and are not soluble in water.

• They are all not soluble in water and have the same physical state.

A student is asked to design a sleeve for a cup that will insulate thermal energy and not feel hot to the touch when the cup is filled with hot liquid. The student has four materials to choose from. Which of these materials is least useful as an insulator?

• Cardboard

• Aluminum

• Rubber

• Plastic

A student wants to classify four different objects based on physical properties. The student uses the questions shown in the table to test each object. Which statement correctly identifies two of the materials based on the classification of properties in the table?

• Material 1 is a rubber ball.

  Material 2 is a piece of cardboard.

  
  

• Material 2 is an aluminum washer.

  Material 3 is a copper wire.

  
  

• Material 3 is a piece of cardboard.

  Material 4 is an aluminum washer.

  
  

• Material 1 is a copper wire.

  Material 4 is a rubber ball.

  
  

A science class tested three properties of different materials. The results are shown in the table below. Based on the table, which material would be best to insulate electrical wires?

• Wood

• Plastic

• Copper

• Steel

A group of students is given four small cubes of the same size and instructed to place them in a beaker of water. One cube floats to the surface of the water. Two of the cubes float in the middle of the beaker under the surface of the water. The last cube sinks to the bottom of the beaker.

Which conclusion is best supported by what the students observed?

• Two of the four cubes are soluble in water.

• All four cubes have different masses.

• Each cube is made of a different type of solid material.

• One of the cubes is more dense than the others.