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8 November, 06:49

Jeannie dropped a solid object into a beaker of water and observed it for five minutes. Based on her observations, she determined that only a physical change occurred.

Which of the following observations would indicate that only a physical change occurred after she added the object?

A.

The object broke apart and seemed to disappear when dropped into the glass of water.

B.

The object sank to the bottom when dropped into the glass of water.

C.

Bubbles formed around the object as it sank to the bottom of the water and did not resurface.

D.

The object floated on the top of the water when when dropped into the glass.

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Answers (1)
  1. 8 November, 06:51
    0
    A. The object broke apart and seemed to disappear when dropped into the glass of water.

    Explanation:

    In a physical change, the physical properties of the matter usually the state of the matter is altered. Most physical changes are usually reversible and does not lead to the production of new substances.

    When the solid object was dropped into the water beaker and it dissolves by disappearing the solution, we have experienced a physical change. This is a dissolution reaction. If we heat the solution and water given off, we can recover back the dissolved solid object.
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