GED Science Practice

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What is an Alloy?

  1. a. Having no definite form or distinct shape

  2. b. Fermentation in the absence of oxygen

  3. c. Homogenous mixture composed of two or more metals

  4. d. The maximum value of a wave or vibration

The correct answer is: c. Homogenous mixture composed of two or more metals

An alloy is a homogenous mixture composed of two or more metals, which allows for the combination of different properties to achieve desired characteristics. By mixing metals, alloys can enhance strength, resistance to corrosion, malleability, and other physical properties that may not be present in the individual metals alone. For example, steel is an alloy primarily made of iron, with carbon added to increase strength and hardness. The other choices refer to different scientific concepts. One discusses a state of matter without definite form, another refers to a biological process that occurs in the absence of oxygen, and the last pertains to wave dynamics in physics. None of these definitions relate to the concept of alloys or their properties, which further reinforces why the correct answer captures the essence of what alloys are in material science.

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