Final answer:
A spherical water drop with a diameter of 1.20 inches is an example of a liquid, as it has a definite volume but assumes a spherical shape in space due to the uniform forces acting on it without gravity.
Step-by-step explanation:
A spherical water drop that is 1.20 inches in diameter is an example of a liquid. When we look at the behavior of solids, liquids, and gases, we find that solids have a definite shape and volume, while liquids have a definite volume but no fixed shape. Instead, they take the shape of their container. Gases, on the other hand, have neither a fixed shape nor a fixed volume, as they expand to fill their container. In space, where gravity is not a factor to distort shapes, both liquids and gases can form spheres due to the forces acting on them uniformly in all directions, creating a shape with the least amount of surface area.
Given that a water drop is forming a spherical shape in space, it is still considered a liquid since it retains a definite volume, unlike gases that fill their entire container, and clearly, it is not a solid as it doesn't maintain a fixed shape. Plasmas are ionized gases that also do not have a definite shape or volume and are typically created under extreme heat, such as during a lightning strike, which is not the case for a water drop.