Natural Science CLEP Prep Practice Exam

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Prepare for the CLEP Natural Science Exam with our comprehensive study materials and practice questions. Test your knowledge and ace the exam by mastering key concepts.

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In what form of matter are molecules tightly packed together?

Solids
Gases
Plasma
Liquids

The correct answer is: Solids

Solids are the form of matter in which molecules are tightly packed together. In solids, the particles are held together by strong intermolecular forces, causing them to vibrate in place and maintain a fixed shape and volume. This is different from gases, in which the molecules are spread out and have weak intermolecular forces, and from liquids, in which the molecules are close together but can still move and flow past each other. Plasma, on the other hand, is a form of matter in which the molecules are so highly energized that they have broken apart into ions and electrons. Therefore, plasma is not made up of molecules and is not tightly packed together.