How is matter defined in scientific terms?

Matter is accurately defined in scientific terms as anything that occupies space. This includes all physical substances that have mass and volume. This definition encompasses a wide range of materials, from solids and liquids to gases. It emphasizes the spatial aspect, which is integral to understanding the properties and behavior of matter in different states.

The other choices, while they touch on aspects related to matter, do not fully capture its essence. For instance, saying anything that has weight suggests that weight is a defining characteristic, but weight can vary with gravity and does not apply to non-material systems like light. Referencing visibility limits the definition to only those substances that can be perceived by the human eye, which excludes many forms of matter, such as gases that are invisible. Finally, defining matter as anything that can be measured overlooks the essential aspect of occupying space, making it less precise. Therefore, the focus on occupying space provides a comprehensive foundation for understanding matter in a scientific context.