Humber Admissions Practice Test

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Which state of matter is characterized by a fixed volume and fixed shape?

Liquid state
Gas state
SOLID STATE
Plasma state

The correct answer is: SOLID STATE

The solid state is characterized by having a fixed volume and a fixed shape due to the tightly packed arrangement of its particles. In solids, the particles vibrate in place but do not have enough energy to move freely, which maintains their structure and volume without change. This is in contrast to liquids, which have a fixed volume but take the shape of their container due to more energy allowing particles to move past each other. Gases do not have a fixed volume or shape; they expand to fill their container completely. Similarly, plasma, which consists of ionized gas particles, does not possess a fixed volume or shape, as the charged particles move freely as well. Thus, the defining characteristics of solids distinguish them clearly from the other states of matter.