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Science

6th -

8thgrade

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Mod J Unit 2 Lesson 2 Changes of State

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  • 1. Multiple Choice
    5 minutes
    1 pt

    Which phrase describes the changes that take place when a gas condenses?

    loss of energy and increased freedom of particle motion

    gain of energy and increased freedomeof particle movement

    loss of energy and decreased freedom of particle motion

    gain of energy and decreased freedome of particle motion

  • 2. Multiple Choice
    5 minutes
    1 pt
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    Addison warms a pure, solid substance in a system closed off from the surroundings. He listed the changes in temperature over time and the physical state of the substance. Which of these could represent the missing values in Addison’s data table?

    X = 50, Y= 100,

    Z = 50

    X = 50 , Y = 100,

    Z = 150

    X = -50, Y = -100

    Z = -50

    X = -50, Y = -100

    Z = -150

  • 3. Multiple Choice
    5 minutes
    1 pt

    Frost forms when water vapor changes directly from a gas to ice in a process called deposition. If you were to model the water particles before and after deposition, how would they compare?

    Before deposition, the particles vibrate in place; after deposition, they slide by each other.

    Before deposition, the particles slide by each other; after deposition, they vibrate in place.

    Before deposition, the particles vibrate in place; after deposition, they move quickly in all directions.

    Before deposition, the particles move quickly in all directions; after deposition, they vibrate in place.

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