What defines matter?

Matter is fundamentally defined as anything that occupies space and has weight. This includes solids, liquids, and gases, making it a broad category that encompasses all physical substances around us. The definition highlights two key characteristics: the ability to take up space, which is essential to distinguish matter from energy, and having weight, which is related to the mass of the substance.

Understanding this definition is crucial in fields like physics and chemistry, where the properties of different states of matter are analyzed. By recognizing this broad criterion, one can understand that not only do solids and liquids count as matter, but gases also fall within this definition, leading to a comprehensive understanding of various forms of matter in different contexts.

The other options are too restrictive or inaccurate as definitions of matter, as they either limit the scope to only certain states of matter or confuse matter with energy. This understanding lays the foundation for advanced topics in physical science and engineering, making it vital for students in the Navy's Aviation Electronics Technician program.