Question

1. which physical properties of matter discussed in the animation can be observed or measured regardless of the matter’s amount?

Explanation:

The question is about physical properties of matter that are independent of the amount of matter, which are intensive properties. Common intensive properties include density, color, melting point, boiling point, hardness, etc. These properties do not change with the quantity of the substance. For example, the density of a substance remains the same whether you have a small sample or a large sample of it. Color is also an intensive property as it doesn't depend on how much of the matter you have. Melting and boiling points are characteristic of the substance and don't vary with the amount (as long as pressure etc. are constant). Hardness is a measure of how resistant a material is to scratching or indentation and is also independent of the amount of the material.

Answer:

Intensive physical properties such as density, color, melting point, boiling point, hardness (and others like specific heat, refractive index, etc.) can be observed or measured regardless of the matter’s amount. These properties do not depend on the quantity of the substance. For example, the density of a metal is the same whether you have a small piece or a large block of it; the color of a substance doesn't change if you have more or less of it; the melting point of water is \(0^\circ\text{C}\) no matter if you have a drop or a liter of water (at standard pressure).