Study

Concept 2.1

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  • Put true or false (3) No spaces are left between railroads tracks.
    False
  • choose the correct answer
    c. Gas
  • Put true or false (2) When a liquid is cooled, it may change into gas.
    False
  • (3)
    e. is a mixture of rock, sand and water
  • Put true or false (4) Metals such as iron and copper allow heat to transfer through them freely.
    True
  • choose the correct answer
    a. expand
  • Arrange the three states of matter ( Solid - Liquid - Gas) in a descending order according to the force holding molecules together.
    1) Solid 2) Liquid 3) Gas
  • choose the correct answer
    b. heat transfer from the sand to your feet.
  • (2)
    A. is a mixture of iron and other elements
  • It changes from solid state to liquid state
  • choose the correct answer
    c. Equal to
  • Because they are metals that allow the heat to transfer through their particles.
  • Put true or false (1) when mixing two substances with the different temperature, their avverage temperature is lower than their final temperature.
    False
  • (1)
    B. Light up in the dark