Chemistry

9th -

10thgrade

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The Particulate Nature of Matter

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20 questions

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  • 1. Multiple Choice
    1 minute
    1 pt

    Which statement best describes the fact that gases can be compressed?

    The particles in a gas do not have a fixed volume.

    The particles in a gas are very far apart.

    The particles in a gas have no force of attraction (bonds) between them.

    The particles in a gas are constantly moving very rapidly.

  • 2. Multiple Choice
    1 minute
    1 pt

    Which statement(s) best describes the fact that a liquid flows?

    The particles in a liquid have weak bonds between them.

    The particles in a liquid have no fixed position.

    The particles in a liquid are close and touching.

    The particles in a liquid are moving slowly over each other.

  • 3. Multiple Choice
    2 minutes
    1 pt

    When a liquid evaporates the temperature of the liquid decreases. Which statement(s) best describes why this happens?

    Some closely packed particles at the surface of the liquid break the bonds which are keeping them close to neighbouring particles.

    Breaking bonds is an endothermic process (requires energy).

    When particles enter the gaseous state they take their (kinetic) energy with them.

    Particles at the surface of the liquid make bonds with gaseous particles above the surface of the liquid.

    Making bonds is an exothermic process (releases energy).

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