Solids, Liquids And Gases Properties Summary Quiz

The word "Hard" describes a solid because solids have a rigid and firm structure that is difficult to deform or change shape. Solids maintain their shape and volume, unlike liquids or gases.

Despite sand being able to flow, each individual sand grain is a solid.

A gas is described as having low density because gases are composed of particles that are spread out and have a lot of empty space between them. This allows gases to be easily compressed and have a low mass per unit volume compared to liquids and solids.

Solids cannot be easily compressed because the particles in a solid are tightly packed together, resulting in a fixed volume and shape. Unlike gases or liquids, solids have a high density and their particles do not have the ability to move freely. Therefore, the statement "easily compressed" does not describe solids.

The phrase "easily compressed" means that the material can be easily squashed or compressed, indicating that it can be easily reduced in volume or size under pressure. This suggests that the material is not resistant to external force and can be easily compressed or squeezed together.

This answer is incorrect. Toothpaste is not a liquid, but rather a semi-solid or gel-like substance. It is composed of a combination of solid and liquid ingredients, such as abrasives, binders, and water. Although toothpaste may have a slightly liquid-like consistency, it does not have the properties or behavior of a true liquid.

Gases do not have a fixed shape, meaning they can expand and contract to fill the space available to them. They also do not have a fixed volume, as they can expand or compress depending on the conditions. Gases have low density compared to solids and liquids. Additionally, gases spread out to fill the container they are in, taking the shape of the container. However, gases do flow, meaning they can move from one place to another.

The term "fixed volume" describes a liquid because liquids have a definite volume that remains constant regardless of the container they are in or the amount of liquid present. Unlike gases, which can expand or contract to fill the entire volume of a container, liquids maintain their volume and do not easily compress. Therefore, "fixed volume" is an appropriate description for a liquid.

Liquids are not less dense than gases. Density is a measure of how closely packed the particles are in a substance. Liquids have a higher density compared to gases because their particles are closer together. This is why liquids have a fixed volume, as the particles are tightly packed and cannot be compressed easily. Liquids also do not have a fixed shape and usually flow freely, which distinguishes them from solids.

When a bag containing a gas is compressed, the gas molecules are forced closer together, causing the bag to decrease in size. However, since gas is invisible, you wouldn't be able to see the gas itself. Therefore, the correct answer is that the bag gets smaller but you don't see anything.

Treacle is a thick, sticky syrup that is commonly used in cooking. It is a liquid because it can flow and take the shape of its container. Wet mud is also a liquid because it is a mixture of water and soil, which can flow and has a definite volume but not a definite shape. Sponge, jelly, and sand are not liquids as they do not flow and cannot take the shape of their containers.